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  1. Custom Fit Vehicle Wiring
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FITS 2005 Toyota Highlander
T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Item # 118248
Retail:$55.96
Our Price: $39.74
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Custom Fit Vehicle Wiring
Confirmed to Fit
2005 Toyota Highlander

with factory Tow Package

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T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector 4 Flat 118248
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The best technical support and full custom fit vehicle wiring installation instructions. Great price Highlander custom fit vehicle wiring and expert service. Toyota Highlander, 2005 custom fit vehicle wiring by Tekonsha are available from etrailer.com. For expert service call 1-800-940-8924 to order your T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector part number 118248, or order online at etrailer.com.
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2005 Toyota Highlander - T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

  • Trailer Hitch Wiring
  • 4 Flat
  • Powered Converter
  • Tekonsha

Quickly and easily install a 4-way trailer connector on your Toyota Highlander with this custom harness. T-One connector plugs directly into OEM tow package port - no cutting, splicing or tapping required. Powered ModuLite reduces strain on wiring system.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point in rear cargo area
    • Plug in connector
  • Includes ModuLite to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed of 16-gauge bonded wire
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 2.1 amps per circuit
    • Tail lights: 5 amps per circuit
  • 1-Year limited warranty


Installation

This custom-fit T-One connector plugs into your vehicle's factory tow package wiring harness, which is located behind the driver's-side interior trim panel in your rear cargo area. Once you've plugged in the connector, locate the "towing fuse" position in your fuse box and insert the included 10-amp fuse.


Once installation is complete, the 4-way flat connector will be stowed in an out-of-the-way location within your cargo area.


It is recommended that you use a small amount of grease on all electrical connections - the plug on your automobile and the 4-pole connector itself - to help prevent corrosion.


ModuLite Powered Tail Light Converter

A ModuLite power module is built into this T-One connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of your trailer. This power module functions as a tail light converter to combine the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.



118248 Tow Ready T-1 T-Connector - OE Replacement 4-Flat - Modu-Lite

Installation Details 118248 Installation instructions

California residents: click here


Customer Satisfaction Score:


Customer Reviews

T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 118248

Average Customer Rating:  4.9 out of 5 stars   (209 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-One connector plugs directly into OEM tow package port - no cutting, splicing or tapping required. Powered ModuLite reduces strain on wiring system.

by:
2006 ToyotaHighlander

Wish I bought etralier's tow harness earlier. Easy installation. Toyota dealership sold me the wrong one and of course waited too long to return. But use some of the parts from that harness on the one from etrailer(see pics). Would order again from etrailer. Thank you

Jeff

4/24/2022

Still working flawlessly from the day I installed it. Thks etrailer



by:
2004 ToyotaHighlander

Pluged into the pre-wired factory tow-package connection. 10amp fuse was sent .. toyota says use 20amp in manual and in fuse box,. used a 15amp fuse,. No drilling factory holes were fine in both the electrical wire run threw hole and hitch installation pre-drilled holes for trailer hitch,.

before ordering check under the hood of your highlander's fuse box to see if it has a tow fuse option/s that tells you if its factory electrical pre-tow plug or not in the back,. look at my photo's of the wireing and hitch,. get the hitch that loops below the muffler,. also it depends on the year of the highlander,.



by:
2004 ToyotaHighlander

Receive product in record time. Took longer to get myself in gear. From start to finish, removing trim as per your video, unplugging original harness, installing your product, reinstalling trim, may have taken 20 to 25 minutes. That includes using a rubber body plug to route wiring to a permanant wire mount at the hitch instead of harness out the hatch when needed.



by:
2010 ToyotaHighlander

We installed this on my 2006 Highlander Hybrid in about 20 minutes. It took 20 because we are stupid. It really only takes about 10 minutes. #WellDone eTrailer. Both my hitch and harness are from you and are perfect!



by:

The item was well packed when arrived, was very easy to install and set up, video on the page was very helpful and you can see that not only is a good quality but good looking too.



by:

Instructions provided with adapter are good. My 04 Highlander without tow package had the connector under rear, driver-side cargo tray. Lift the cargo floor, remove the tire-change-tool tray, remove the two plastic nuts on the bottom of the left-side tub, and lift it out. Also under that storage tub is an unused 6mm threaded hole in the body to be used for the ground. Put a fuse in the correct spot of engine compartment fuse block (mine was empty) and good to go. See underside of fuse block lid for tow adapter fuse placement.

Michael A.

1/9/2021

Used 20 times this summer with no issues. I would buy again.



by:

I was very pleased with the perfect match and plug-and-play aspects of this connector.

The unit which I replaced had fuses in each of the leads for lights (running and left/right function). Since the leads in your unit were not similarly fused, which seemed like a good idea, I just cut off the wires heading to the trailer plug from the black box, and retained my original wiring with fuses from that point onward.

Pete T.

12/7/2015

It must be functioning perfectly, because I havent given it a second thought. I like functioning perfectly, and have high expectations it will contiue to do so.



by:

worked great - had uhaul originally do wiring - it was a mess. they had run a wire under car to battery when power was already in back with factory installed harness. The wiring harness I bought at etrailer fit perfect and was installed by me in 10 minutes or less. and was $100 dollars cheeper than uhaul. Thanks !

Scott P.

9/15/2015

It has worked perfect- no complaints.



by:

Anthony took me through everything I needed to fix an inoperative unit that had been previously installed. The etrailer video showed me everything else I needed. In hind sight I should have gotten the 4/7 pin unit since when I picked up my rental it was a 7 pin. I picked up a 7 adapter on site and was on the road. Thanks Anthony!

Bob B.

7/21/2018

Works great, been dragging our trailer for 5 months.



by:
ToyotaHighlander

Connected and worked with no problem. Was not sure if my highlande highbrid had the tow package but after some research i discovered that all highlander hybrids come with a tow package even if it does not have the trailer hitch receiver

Edwin R.

8/5/2015

What year is your HL highbred?Where did you find the info that all HL highbreds have the tow package?



by:

Well made, easy install. Both items better than expected. Thanks



by:
2007 ToyotaHighlander

I am no mechanic, but the hitch wiring was easy to install on our 07 Highlander. Find an installation video on-line.
Works without a hitch!

Daniel O.

4/4/2018

We have not had any issues a year later.



by:

Dianna was able to answer all of my questions, especially my concern about the hitch being compatible with a full sized spare tire, which it was. the hitch was installed and in use with a bike rack within hours of delivery. Just what we needed.



by:
2006 ToyotaHighlander

Ordered this Toyota highlander trailer tow harness. I've been it using for over a year. It came in a timely manner, installed easily, and performs well. It is well thought out, in that it installs easily, did not have to get under the car at all to install. No special tools required. The trailer led is long enough to directly connect to either of my two trailers. (a small camper pop up, and a small 4x8 utility trailer. The led just lays in the rear tool compartment out of the way when not in use. The led simply goes under the rear hatch door when in use.



by:

Easy install 15 minutes start to finish including running electrical. Has worked out well.
Sanitary fits perfectly fit and finish better than OEM

Matt K.

6/19/2018

Still good just ordered new hitch and wiring kit for another vehicle



by:
Toyota Tacoma

My first purchase from etrailer and I couldn't be more pleased. The wiring kit for my Highlander ( 06) went together without a hitch, and best of all, worked perfectly. I was lucky enough to have AngelaK on the other end and she was most helpful with my order. I hung up feeling good about the whole thing. I've already recommended etrailer to my son who was having trouble with the 4way on his Tacoma.



by:
ToyotaHighlander

The kit was very easy to install. I like that the trailer electrical connector is hidden inside the highlander side panel when not in use. Only takes a second to access and route through the hatch door when needed.



by:
2007 ToyotaHighlander

I highly endorse this product. Super easy to install (2007 Toyota Highlander) and made my life ten times easier. Had to haul a trailer full of film equipment 3 hours up to Vermont and back with 6 college students in the car. Worked beautifully to and from. Need to upgrade the harness on my Subaru Outback sometime soon. I know where I'm buying it from.



by:

Excellent plug and play adapter. Took a second to find the right wiring harness to plug into but then it went great! works seamlessly and stows cleanly away in the cargo area hidden storage. awesome product.



by:

Ordering with etrailer was super helpful. I was adding a hitch to an older model highlander and e trailer staff were awesome at getting back to me by phone and emailing links to make sure I got exactly what I needed. Shipment to Alberta Canada was prompt. Would definitely recommend ordering from e trailer.



by:

Great service, great product.

The harness was extremely easy to connect to my vehicle - no splicing wires :)

thank you!

Russ

5/5/2015

thanks for the note, your product is still working fine, no problems



by:
2007 ToyotaHighlander

After troubleshooting why my trailer lights were not working, I discovered that the power module on my 2007 Toyota Highlander was bad. I searched the net and found etrailer.com, found a replacement wiring harness and ordered it. The harness arrived quicker than I expected and I was able to remove the old harness and replace with the new with no problems. The new harness works great! I'm back on the road with my bass boat lookin' for that lunker.



by:
2007 ToyotaHighlander

The wiring harness fits just as advertised and works great. Very fast communication from etrailer when the original part number that I ordered was on back order. They saw the problem and suggested an alternate part that was available to ship immediately within just a few hours of my online order.



by:
2006 ToyotaHighlander

Trailer light harness for a 2006 Toyota Highlander Hybrid was easy to install (once I found the correct connector), and worked perfectly. Unfortunately, we sold the vehicle not long after the installation, so I didn't get to use it as much as I had planned.



by:
Toyota

Very nice products - loved the fabrication and powder-coating of the hitch. Shipped promptly, good on-line tracking information. Good prices. Good instructions. It only took about an hour to install the hitch and wiring harness.

Only possible improvements might be to omit the purchase order label stuck to the hitch. It was tough to get off. The installation took a little longer because I had to run to the parts store as part of the installation was to purchase three plastic one-time fasteners that Toyota uses to cover the fuse panel.

I'm a happy customer!


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Show More Reviews

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • Mounting Bracket Recommendation for a 4-Flat Trailer Connector on a 2006 Toyota Highlander Hybrid
    The bracket that I would recommend to mount a 4-way connector on the outside of your vehicle is the 4-Pole Flat Mounting Bracket, # 18144. This bracket can attach directly to your trailer hitch using the self tapping screws or it can be used with a Universal No-Drill Mount Bracket, # 18140, so you do not have to drill into your trailer hitch. I have attached a video showing how to install this bracket on a Curt trailer hitch for you to check out.
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  • Should Included 10 amp Fuse of the Tow Ready Wiring Harness part # 118248 Be Used or Factory 20 Amp
    You want to use the included 10 amp fuse that came with the Tow Ready wiring harness part # 118248. The amperage rating of the included fuse was picked because if the voltage exceeds 10 amps on that circuit the wiring harness will fail. It comes down to which you would rather replace in the event of a short, the 10 amp fuse or the # 118248.
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  • Recommended Wiring Harness for a 2004 Toyota Highlander With a Factory Tow Package
    The 2 options for a 4-Way wiring harness that you have for your 2004 Toyota Highlander are just different manufacturers. Out of the Tekonsha T-One Wiring Harness # 118248 and the Curt T-Connector Wiring Harness # C56107, I recommend going with the Tekonsha version as Tekonsha is one of our most reliable wiring companies. I have attached a video of the T-One harness being installed on a 2004 Highlander for you to reference as well. If you are needing to install a 7-Way wiring harness at...
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  • Trailer Wiring Recommendation for 2005 Toyota Highlander without Tow Package
    Most likely what you need is the part # 118413. This is the recommended trailer wiring kit for your 2005 Toyota Highlander if it did not have the tow package. Since your vehicle doesn't have wiring already you wouldn't want the other kit part # 118248 as it is designed as a factory replacement. I attached an install video for you to check out as well.
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  • Troubleshooting Trailer Harness On 2004 Toyota Highlander
    If the lights are not working on your trailer and you are unable to find any current at the vehicle side connector it sounds like you may have a blown fuse. Per the installation instructions for the T-One Vehicle Wiring Harness for Factory Tow Package, part # 118248, you will need to find the towing fuse and insert the included 10-amp fuse. Look in the engine compartment for the fuse. From my research I found that the towing fuse is in position 11. Check the fuse to make sure it is good...
    view full answer...
  • Best Trailer Wiring Harness for a 2006 Toyota Highlander with LED Tail Lights
    The Tow Ready trailer wiring harness # 118248 will work on your 2006 Toyota Highlander with LED tail lights. This particular harness is designed to fit models that have the factory tow package. If your Highlander did not come with the factory tow package and it is a Hybrid model use # C59236. If it is not a hybrid use # 118413. All of these harnesses will work with LED tail lights.
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  • Trailer Wiring Recommendation for 2004 Toyota Highlander with Tow Package
    For your 2004 Toyota Highlander with a factory tow package the best trailer wiring option we have is the Tekonsha part # 118248 which is a confirmed fit. Tekonsha is the most reliable brand we offer for trailer wiring so we recommend it highly.
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  • Does Anything Need to Be Changed When Going From Incandescent Bulbs to Led Trailer Lights
    You should have no problem using the Tow Ready Wiring Harness # 118248 on your 2007 Toyota Highlander with a trailer that has LED tail lights. The only time LED lights require something being changed is when you go from incandescent bulbs on a blinker circuit of a vehicle to LED lights. Then you might have a hyper-flashing situation, but that is not an issue with trailers. It should perform fine with either bulb style on a trailer.
    view full answer...
  • Curt Trailer Hitch Receiver Fit on 2006 Toyota Highlander Hybrid
    There is a trailer hitch receiver from Curt that fits your 2006 Toyota Highlander hybrid, though it's a different part number than the one you mentioned. The correct fit for the Curt hitch for your '06 Highlander hybrid is the following: - Curt Trailer Hitch Receiver # 13530 I verified this fit with the manufacturer for you, and this will give your Highlander a 2 inch hitch and install easily by bolting on without any drilling into your frame required. The only other thing you may need...
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  • 2006 Toyota Highlander Hybrid Trailer Wiring Kit
    Sounds like you don't have the tow package on your 2006 Toyota Highlander which is why the part # 118248 does not fit. For your Highlander, non-hybrid, with factory tow package, the correct wiring harness is the Tekonsha # 118248.
    view full answer...
  • Trailer Wiring Recommendation for a 2004 Toyota Highlander with Tow Package
    For trailer wiring for your 2004 Toyota Highlander with the tow package you would want the Tow Ready harness part # 118248 for trailer wiring. I attached an install video for you to check out as well.
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  • Will a Trailer Hitch from a 2001 Toyota Highlander Fit on a 2007 Toyota Highlander
    The 2001 Toyota Highlander and your 2007 Toyota Highlander cannot use the same trailer hitches. Toyota made a few changes to the Highlander in 2004 because they introduced the optional third row seating for seven passengers. The new designed created a depression in the trunk for all models and the rear bumper was changed as well. Due to these changes trailer hitch manufacturers had to design a new trailer hitch for the Highlander beginning in 2004 through 2007 so it would not interfere...
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  • Trailer Wiring Kits that Fit 2004 Toyota Highlander
    We have two trailer wiring kits that fit your 2004 Toyota Highlander. We have the # 118413 which fits all styles of the vehicle and the # 118248 which fits the versions of the vehicle that have tow package wiring. This is normally the kit I'd recommend for you since you have the tow package, but since it sounds like you looked for the correct connector and couldn't find it the safe bet is the # 118413 which easily installs by plugging inline with the vehicle's taillight connectors. I attached...
    view full answer...
  • Receiver Hitch, Wiring and Other Necessary Towing Accessories for 2007 Dodge Caliber
    In order to tow a trailer, you will need a hitch, a draw bar and pin and clip, a trailer ball and a vehicle wiring harness. I would recommend the Draw-Tite Class I receiver, part # 24769. This receiver fits all Caliber Models EXCEPT for the R/T model. This hitch includes the pin and clip. If you have the R/T model, Curt Manufacturing offers a Class I receiver, part # C11006 that will fit all models except for the SRT-4. The draw bar and pin and clip are also included. The trailer rental...
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  • Recommended Trailer Brake Controller and Wiring for 2006 Toyota Highlander
    You can absolutely install a trailer brake controller on your 2006 Toyota Highlander. Starting with the brake controller itself, I highly recommend the Tekonsha Prodigy P2 # 90885. This is an excellent proportional controller that will activate your utility trailer's brakes at the same time and with the same intensity that you apply to them in your Highlander. It features an easy-to-read digital display along with continuous diagnostics that will alert you to potential issues. It will...
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  • Trailer Wiring Harness for 2005 Toyota Highlander Limited
    Since your Highlander has the tow package, you'll want to use the Tekonsha # 118248 wiring harness. You'll want to use a circuit tester like # PTW2993 to probe the sockets on that connector in your photo to make sure it's active. If it isn't, make sure there's a 20A fuse installed in location # 11 in the fuse panel in the engine compartment (see provided diagram). I've linked you to an installation video.
    view full answer...
    Image 1 for Image 2 for
  • Wiring Harness for 2007 Toyota Highlander Hybrid
    It definitely looks like you found the right connector for a tow package on your 2007 Toyota Highlander Hybrid! With this being the case I recommend using the Curt T-Connector # C56107 because it has higher amp ratings than the Tekonsha T-One # 118248. This will fit directly to the connector in the picture that you submitted. Attached are the installation instructions for you to check out.
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    Image 1 for
  • Trailer Hitch and Wiring for a 2007 Toyota Highlander
    Draw-Tite, the manufacturer of trailer hitch # 75726, lists it as a fit for 2008 to 2013 Toyota Highlanders so I cannot recommend it for a 2007 model. The Draw-Tite equivalent for the 2007 is # 75153. I have linked a video showing an example installation of this hitch for you. If you plan on doing some towing I recommend etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes...
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  • How To Install a Tekonsha Prodigy Proportional Brake Controller on a 2008 Toyota FJ Cruiser
    There is no custom wiring for the FJ Cruiser that plugs in under the dashboard for a brake controller. To install a brake controller you would need to run wires from the 7-way connector. If you have no wiring on the vehicle now we recommend the appropriate flat four pole harness part # 118248 for an FJ with tow package or part # 118405 for an FJ without tow package. Once you have the 4-Way in operation, you can convert it to a 7-Way using part # ETBC7. You will then attach the red wire...
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  • Will Wiring Harness Part # 118248 Fit a 2007 Toyota Highlander without a Tow Package
    The 118248 is only for 2007 Highlanders with a tow package. If you do not have a tow package, you would use part # 118413.
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  • Will Curt Trailer Hitch 13530 Fit a Hybrid and Non-Hybrid 2006 Toyota Highlander
    As far as trailer hitch # 13530 it will indeed fit both a 2006 Toyota Highlander and Highlander Hybrid. I have linked a video showing a typical installation and the instructions for you. If you plan on doing some towing I recommend the etrailer ball mount kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a storage bag. For trailer wiring, the option you'd use will depend on how your Highlander is equipped: • For a non-hybrid without the tow package, use...
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  • Hitch Class Rating for 2006 Toyota Highlander
    It is not uncommon to see a 2 inch hitch rated at 3,500 lbs gross trailer weight called a Class III hitch. Because of the construction of the 2006 Toyota Highlander the hitches for it are only rated up to 3,500 pounds weight carrying. Class III hitches are rated up to 6,000 lbs gross trailer weight with 600 lbs tongue weight depending on the vehicle the hitch is designed for. We have an article that provides more information regarding different hitch classes and their capacities, I will...
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  • Does the Draw-Tite Trailer Hitch # 75153 Extend Past the Rear Bumper on a 2006 Toyota Highlander
    All of the hitches available for the 2006 Toyota Highlander are designed with the end of the receiver very close to flush with the back of the rear bumper. The hitch itself will not extend past the bumper, without a drawbar installed in the hitch. I have posted a photo that should help you visualize where the receiver on the Draw-Tite Max-Frame Trailer Hitch, item # 75153, will be placed. I have also provided links to instructions and a installation video for you to review. The K78229...
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    Image 1 for
  • How To Find the Trailer Fuses and Relays On a 2006 Toyota Highlander Hybrid
    If you have a factory plug on your 2006 Toyota Highlander then these circuits will be protected by fuses and relays built into the factory fuse box located under your hood. In order to be sure you are looking in the correct locations you will need to either look in your owner's manual for these locations or there will be a diagram printed on the underside of the fuse box lid with this information for you. If you do not already have the trailer connector portion of the harness then I recommend...
    view full answer...


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