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2-Wire Pigtail for Optronics Backup and Utility Trailer Lights - 2-Prong PL-3 Plug

2-Wire Pigtail for Optronics Backup and Utility Trailer Lights - 2-Prong PL-3 Plug

Item # A45CB
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Optronics Straight Pigtail Accessories and Parts - A45CB
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This 2-wire pigtail has a male plug on one end that pairs with the female connection on the back of your Optronics light. Color-coded wire lead is 10" long. Designed specifically for backup and utility lights. 1-800-940-8924 to order Optronics accessories and parts part number A45CB or order online at Free expert support on all Optronics products. Great prices and Fastest Shipping for 2-Wire Pigtail for Optronics Backup and Utility Trailer Lights - 2-Prong PL-3 Plug. Accessories and Parts reviews from real customers.
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  • Reviews (101)
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Optronics Accessories and Parts - A45CB

  • Trailer Lights
  • Wiring
  • Plugs and Pigtails
  • Two Wire
  • Optronics
  • Straight Pigtail
  • 10 Inch Long

This 2-wire pigtail has a male plug on one end that pairs with the female connection on the back of your Optronics light. Color-coded wire lead is 10" long. Designed specifically for backup and utility lights.


  • Pigtail with 2-prong plug allows you to wire your Optronics light to your trailer
    • Designed specifically for use with Optronics backup and utility lights
  • Male-pin, 2-prong PL-3 molded plastic plug connects to back of trailer light
  • 2-Wire pigtail
    • White wire for ground
    • Red wire for power
  • #10 Ring terminal on ground wire
  • Approximate wire length: 10"

Optronics A45CB 2-Wire Pigtail Dimensions

Pigtail is a direct replacement for:

  • Wesbar # 729062
  • Truck Lite # 94925
  • Grote # 67010
  • Peterson # B431-49

A45CB Optronics Straight 2-Wire Pigtail for Trailer Back Up and Utility Lights - 2-Pin PL-3 Plug

Alternate part number: A-45CB

California residents: click here

Video of 2-Wire Pigtail for Optronics Backup and Utility Trailer Lights - 2-Prong PL-3 Plug

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Optronics Backup and Utility Trailer Lights 2-Wire Pigtail Installation

Hello neighbors. It's Brad here at etrailer. And today we're taking a look at the Optronics two prong pigtail. Now this is gonna be for a reverse light function in a LED light here. Now, this is normally how you plug-in to get your reverse signal by tying into your reverse light wire. Now, the back of these actually have a two prong design and getting normal, but your pin connectors is kind of tricky to get those in place and that eliminates it.

It makes it plug and play. Once we attach our wires. So here we have our old light installed and we've upgraded our trailer to a seven pole, and that's gonna allow us to have that reverse light function. Well, just putting the taillights in place isn't gonna give us that function if we need to tie into it. So here we have our standard three prong floor, our turn signal, brake lights and running lights.

But for your reverse light signal there's gonna be this two prong. So to get that to work, we're gonna use our pigtail to plug in and we'll tie those wires in. And one of the first things you're gonna want to do is determine which wire has your reverse light function and have that routed down to pretty close around the taillight. We're then going to take our pigtail here and you're gonna see there's two wires. The red which is gonna tie into that wire and then just a white with a ring terminal for our ground.

So I'll go ahead and make our cut. And then we're just gonna strip this back a little bit. And the red's pre-stripped slightly, but I'm gonna go ahead and just get a little bit more on there. And then using a butt connector, we'll go ahead and get these crimped together. Now here, we're putting this in an enclosed trailer and all this wiring lives inside the trailer.

So it shouldn't be exposed to the elements. So if you're throwing reverse lights on a normal utility trailer or something that is exposed to the elements, I highly recommend picking up some heat shrink butt connectors which we have here at etrailer. And that way, once it's crimped down you can heat shrink that. And it's gonna seal that up making sure that water doesn't get in there. Now, once you've made your connections just give it a slight tug, just to make sure that it's actually connected properly. From here, we're gonna take our ring terminal and I'm gonna take a self-tapping screw, it's not included with the light, but you can pick those up here at etrailer or a local hardware store or if you have some lying around the garage and we're just gonna find a solid metal piece which we have a lot of our framework around here. So finding a spot shouldn't be too terribly hard. So just make sure that your plug is gonna be able to reach that reverse light signal there. And then once you have that determined you can go ahead and get your self tapping screw in place and anywhere that's solid metal that attaches to the frame is gonna be a great option. So now we have that mounted up. All I need to do is unplug our old light. Get our new one with that reverse light function in and plug it in. So there's our standard light there. And then our reverse here. It's just gonna plug in. You can see there's little slots here so it's gonna make it nice and easy to get this in place and get it tight. So you can see this little upswing here is gonna face towards the middle there. And once we have those bullet connectors lined up we can go ahead and press this in. It does take a little bit of pressure to get these to seat but it's gonna hold it in place very well. There we go. You're gonna want to hear that nice pop there. So you know that it's sealed and then all we have to do is put our light back in place and then test to make sure it's working. So now you can see we've gone ahead and put our vehicle in reverse. And our reverse signal is now working because we now have that connector. So pretty easy, simple installation to make your reverse lights work. Now, all that's left to do is go back, kind of clean up some of your wires with some zip ties get your panel back in place and then you're ready to start using your trailer with the reverse light function..

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Customer Reviews

2-Wire Pigtail for Optronics Backup and Utility Trailer Lights - 2-Prong PL-3 Plug - A45CB

Average Customer Rating:  4.7 out of 5 stars   (101 Customer Reviews)

This 2-wire pigtail has a male plug on one end that pairs with the female connection on the back of your Optronics light. Color-coded wire lead is 10" long. Designed specifically for backup and utility lights.


The products I received were of good quality, however the shipping method was horrible. Lights were just thrown in a box all together with nothing protecting them. Now I have new lights that look very old because of the scratches all over them. This is my first bad experience with etrailer,hopefully the last.

Etrailer Expert

Jenny N.


I can understand your disappointment with the lights. I will have our Customer Service team reach out to you.


Just what I wanted. They appear to be well made. I’m putting backup lights on my travel trailer. I had to back into black a black hole campsite last year and they’ve been on my bucket list of things to add ever since.


Sealing to back of light doesnt seam robust sense the is right in splash area og trailer tire and general road spray. Had to wrap seam of connector to housing with electrical tape.



Everything is good


Fast delivery. Exactly what I needed.


Items arrived as described. Good quality, price and fast delivery made this purchase an overall great deal. The lights and the cables I haven’t test them, waiting for my truck replacement bumper to arrive in September and have the body shop install them for me. I will update my review, but for now I recommend this products and the seller.



After a year using this product function-ability still performing as described. I recommend this product and seller.


I ordered the STL101RB Trailer Tail Light - Stop, Tail, Turn, Backup - LED to replace the standard tail lights on my Yamah Drive G19 golf cart. They replaced to stock ones perfectly as a neat way to add a backup lights for a custom feature. The backups led are actuated by the reverse switch on the dash.

It should be noted that the ground terminal on the two wire pigtail connection is not wired internally to the backup LEDs. They rely on the ground supplied by the three wire pigtail. Not a big deal, but worth noting. It throws a curve when bench testing.

These lamps add a nice custom touch!


Replaced the reverse lights on my 2009 Mastercraft trailer. Easy splice into trailer wiring and snug fit into new light (item BUL72CB).



So far so good, they are working as expected and I may have to replace a few on the other side of the trailer with the same items.


I have been a heavy equipment mechanic for over 35 years. I mounted the stop , turn and tail LED lights along with the clear utility LED lights in the headache rack on my new service truck. Order was fulfilled quickly and completely, and wonderful correspondence all the way to shipment to my shop. All parts fit properly and I'm well pleased with the performance . One thing that stands out about the stop , turn and tail lights is that the tail light is perfectly lit (not too bright) so that when the turn signal is activated its super bright. This way there is a significant difference. Too many times I've seen LED lights where the tail light looks like the turn signal as far as brightness. The utility lights are far more bright than the reverse lights ,most likely due to DOT regulations. I would recommend using the utility light for cargo space.


Exactly as advertised. They look good. Haven’t tried yet!


I purchased these Submersible LED bulbs for my boat trailer for two reasons. The first is so road traffic is aware of my intentions of backing up and the second is to make it easier to back my trailer into my driveway at night. The only thing that I find disappointing about this product, is that the wires are not sealed. You have to plug a pigtail in to power the bulb. Although they say it is watertight, I still plan on sealing the plug with some marine grade silicone sealant. Otherwise I am very satisfied with the way these bulbs light up my path of travel.


I called and spoke with Lisa D for a special order product that E-trailer needed to order directly from the manufacturer and have it added to their website, and Lisa D kept me updated every step of the way. She got the products order and shipped with a very quick turn around time, which was great b/c I couldn't find any company that could assist me with ordering the lights that i wanted. Very pleased with E-Trailer and Lisa D.


I have been ordering lights for multiple trailers over the past few weeks. All of the lights that I have ordered have been made by one company, yet they have different connectors. WHY WHY WHY??? Get it together.... please ?!? Or please explain to me why you would put male bullet connectors on some lights and female bullet connectors on other lights. I should have one set of connectors that I have to buy to make connectivity... now you are forcing me... and the customers that by from my to do the same.


Worked great to replace lights not working on my trailer.



as expected


Excellent products and service. I will be inquiring soon on a set of 7000lb axles with springs and all hanger hardware.


What a easy repair! I received back up light and replacement pigtail and finished with the installment within thirty minutes. etrailer service and products are excellent and I will not hesitate to repeat business with these guys. Their product description and installment instruction is second to none. In addition, you can not beat the price! When I get ready to upgrade to LED I will look to etrailer first to make my purchase.


Great product. I bought backup lights and t plan on replacing my taillights as well. Have plans on replacing my interior lights to LED as well.

Staff was very helpful and they followed up


Not much to review, these items are exactly what they were described as, and it made installing my new trailer lights extremely easy. For the price, it's 100% worth it as a purchase companion for said tail lights!


Installed in a ranch hand bumper. Used as backup lights. Works great.


Website suggested that I would need these, glad that I ordered them. They worked great. I ran into a clearance issue and ended up needing the elbow low profile plug end instead. However, I didn't know that was the case until after I cut the hole into the fiberglass and test fit the light.


Worked as it was advertised to do.


Great service! Parts ordered arrived in record time, order was complete, and no problems. I had ordered same parts from another supplier, waited 5 weeks and when order arrived it only had one light not two as were ordered. Still having issues trying to get that order resolved. You guys make it easy, will get more orders from me as well as letting my friends know where to order from. Thanks


I'm very happy with the professional, and helpful assistance when ordering to get the exact items needed and the products were perfect in fit and operation. etrailer will now be my go to place and also the place where I refer my friends.


It's a harness. Not much to say. It works. Seems to be manufactured sturdy enough. Time will tell, but it is probably made with super cheap wire that will oxidize (turn black) with age. Such a short piece of wire would ad minimal cost to production and I would gladly pay an extra dollar to get high strand count oxygen free copper.


The Backup Lights work very well. Thank s.


Just the ticket for adding a MUCH better LED backup light on my truck

Show More Reviews

See what our Experts say about this Optronics Accessories and Parts

  • 2 Prong Connector Recommendation for Clearance Light on Boat Trailer
    Based on what you described it sounds like you are looking for the part # A45CB which is a 2 prong connector designed for similar trailer clearance lights.
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  • Gauge Wire Used in the 2-Wire Pigtail for Optronics Trailer Lights # A45CB
    The gauge of wire in the 2-Wire Pigtail for Optronics Trailer Lights # A45CB is 18 gauge.
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  • Can Peterson Round Flush Mount Trailer Light be Installed in 1/8 Inch Thick Diamond Plate
    Yes you can install red flush mount light # 435800 in diamond plate. The grommet will hold the light in place by compression. For a similar backup light you can use # BU45CB with grommet # A45GB and wiring harness # A45CB.
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  • Are LED Lights with More Diodes Brighter and Can a Trailer Backup Light be Used on a Truck
    It is pretty safe to assume that the more diodes in an LED light the brighter it will be. The only time that is not necessarily true is if one light has large diodes and the other doesn't. But any way you slice it light # BUL53CB and its 36 diodes is going to be bright. In this case, for all intents and purposes, a 4-5/16 inch and 4-1/4 inch diameter won't make a difference. The light can be used on your truck. In fact a lot of people use lights like this and other trailer lights on...
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  • Wire Pigtail for Optronics 4 Inch Round LED Trailer Reverse Light
    Although the rear of the lamp features three pins, only two of them are active which is why the 2-prong pigtail is called for (see photo). My guess is rather than design a separate back for lights that only need the 2 pin pigtail, Optronics finds it more cost effective to use a single back for all their 4 inch round lights.
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  • LED Utility Light Recommendation in White for Cabinet Light of Ambulance
    The best solution is going to be with a larger size light if you can enlarge the hole you have like with the Optronics LED Backup Light for Trucks or Trailers # BUL11CB and grommet part # A45GB. You'll need to cut the hole out to 4-1/2 inches in diameter but you'll get a really bright LED setup that will work great. You'll also need a pig tail harness as well with part # A45CB. We don't have anything that would fit a 2-1/2 inch diameter hole.
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  • Wire Color Codes for Optronics 3 Wire Taillight Wiring Pigtail
    On a three wire pigtail that's being used on a stop/turn/taillight, the red wire carries the brake/turn signal circuit, the black wire carries the running lamp circuit and the white wire provides the ground connection. The # BUL53CB lamp you mentioned is a single function lamp only, for that particular lamp, you'd use a 2 wire pigtail, like part # A45CB. On the 2 wire pigtail, red carries the power to the lamp, the white wire is the ground connection.
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  • Will Optronics Trailer Back Up Light Work With 2-Wire Pigtail
    I called my contact at Optronics and asked about the pigtail that can be used with the Oval Trailer Back Up Light, part # BU70CB. I was puzzled by the notes that say you can use the 2-wire pigtail, part # A45CB since the light has a 3-wire plug on the back. My contact said that on the BU70CB, the third plug is a dummy and is not used on this light. The A45CB will plug into two of the plugs and work just fine without compromising the waterproof seal.
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  • Can Sealed, 6-1/2" LED Clear Oval Trailer Utility Light be Used with Wall Switch
    The light part # BUL72CB does use a three prong connector but in reality you only end up using two of the prongs. One for power and one for ground. The connector needed is the part # A45CB which can easily be used with a switch.
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  • Pigtail Recommendation for a Utility Light part # BUL72CB
    The wiring pigtail to use with the part # BUL72CB that you mentioned is the part # A45CB. This plugs right into the back of the light and gives you the wiring you would need to install the light. The white wire for the harness would be for the ground and the red would be for power.
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  • What is the Brightest 12 Volt Fully Submersible Backup Light Available
    If you are looking for a round backup light then I recommend part # BUL53CB but if you are looking for an oval backup light then I recommend part # BUL52CB. Both of these backup lights are completely submersible. The round light has 36 diodes with a 275 candella rating and the oval light has 36 diodes with a 175 candella rating therefore the round light will be a bit brighter than the oval light. In order to mount the round light you will also need part # A45GB or part # A70GB for the...
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  • Troubleshooting No Reverse Light Circuit Present at Rear of Truck 7-Way
    It's not totally uncommon for the reverse light circuit of a 7-way to not be active. I'd recommend using a circuit tester like part # PTW2993 to test the center pin of your 7-way for voltage when the vehicle is in reverse to see if it lights up. It could be as simple as a blown fuse or the circuit may not be present at all which would require you to run wire to the reverse light circuit of the tow vehicle.
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  • Recommended Optronics Assembly for Adding Backup Lights to Sprinter
    I recommend going with the Optronics LED Backup Light # BUL10CB, as it will provide you with a clear, bright LED and it is DOT approved to be used as a backup lamp. The Optronics Sealed Oval LED Light # BUL78CB that you also mentioned is a nice utility light, but it is not actually DOT approved to be used as a backup lamp on a vehicle. To install the light assemblies, you can use the 2-Wire Pigtail # A45CB. The white wire will be attached to a bare metal surface of the frame for ground,...
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  • What are the Dimensions of Optronics Flush Mount LED Backup Light BUL35CB
    The LED backup light # BUL35CB is 5-5/16 inches long x 3-7/16 inches wide x 2-5/16 inches deep. You will also need a wiring pigtail, # A45CB to install this light. For a grommet, use # A33GB. I have included a picture showing the light dimensions for you.
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    Image 1 for
  • Does The Optronics Trailer Light, # BU70CB, Have A Plug-In Wire Attached
    The Optronics Trailer Light, # BU70CB, does not have a plug-in wire attached. It will require the Optronics Straight 2-Wire Pigtail, # A45CB. This part is the 2-prong plug that inserts into the back of the light and has a 6 inch lead with two wires. The red wire is bare at the end and the white ground wire has a ring terminal on the end. You will also need the Optronics Rubber Grommet, # A70GB, for flush mounting the trailer light.
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  • Tips for Installing 6-1/2 Inch Oval Trailer Lights and Grommet in Trailer Frame
    PVC Grommet # a70gb and the lights that fit with them have to have a tight fit in the trailer. Try to press them into the hole as evenly on both sides as possible. Using some soapy water on the grommet and trailer will help it to install easier. If your trailer takes the same size backup lights you can use # BUL002CB with wiring # A45CB which also fits that same grommet.
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  • Troubleshooting Optronics BUL72CB Clear Oval 10 Diode LED with Only 4 Diodes Lighting
    If you are using the 2-Wire Pigtail for Optronics Trailer Lights - 2-Prong PL-10 Plug - 10" Lead # A45CB with the Optronics # BUL72CB lights, then all 10 diodes should be lighting. If you are using the 3 wire pigtail # A47PB then you only need to connect the white and red or the black and white wires. The red or black wire should give you the full 10 diodes, where one of them would only give you the center 4. It sounds like the connections are to the wrong spot on your lights since you...
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  • Bright White Oval Taillight for Reverse Light
    Probably our best option would be the Backup Light part # BUL52CB. This has 36 diodes and is incredibly bright. The dimensions are a bit bigger though at 6-1/2 inch by 2-5/16 inch. For a grommet you'd # A70GB and for a harness part # A45CB.
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  • Wiring Plug Recommendation for the 6-1/2 inch Oval Light part # BU70CB
    I checked with Optronics and they recommend the part # A45CB and part # A49PB for plugs to fit the 6-1/2 inch Oval Light part # BU70CB that you referenced. It could be that your # A45CB just isn't orientated correctly so that it installs correctly, or that you are trying to install the plug into the wrong pins.
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  • Can Optronics LED Backup Light # BUL35CB Be Mounted Horizontally
    The Optronics Flush Mount LED Backup Light you referenced, part # BUL35CB can indeed be mounted onto the deck of a car trailer. The lamp is sealed, so you will have no worries about water entering the lamp housing. You would also need a grommet, part # A33GB and the wiring pigtail, part # A45CB.
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  • Finding Clear Trailer Light to Replace SAE R 97 DOT
    The SAE number isn't typically a great way to track down replacement lights as it's not a part number so I don't know exactly what light you are looking for but the Optronics light part # BU70CB that you referenced is a clear light that is DC powered. You would need a grommet part # A70GB to mount it and then also the 2 prong wiring harness # A45CB.
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  • 4-Inch Round White LED Work Light to Fit Rubber Grommet A45GB
    Optronics round light grommet # A45GB fits a 4-1/2-inch cutout and accepts a 4-inch round light such as # BUL43CB. This round white LED-type work light features 10 super diodes for bright high-efficiency lighting. This light is intended as a work light; it is not certified for use as a backup light. For a 2-wire pigtail lead you can use part # A45CB. Thanks to the high-efficiency of this LED light you can use multiple lights without causing the same power draw demanded by incandescent types.
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  • Replacement Reverse Light for Ranger z521 Boat Trailer
    I have a solution that may work for you, but we do not currently have any 3" diameter submersible reverse lights. Have a look at the Optronics Backup Light # BU45CB which is a 4-1/4" diameter light that can be mounted to your trailer using mounting bracket # BK45BB. You will also need the 2 wire pigtail # A45CB to replace the wiring from your old lights and plugs into the back of this Optronics light. I've attached a photo that outlines the dimensions of the light to see if you can match...
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    Image 1 for Image 2 for
  • What is the Candela Output of Optronics 6-1/2 Inch Incandescent and LED Tail Lights?
    I do recommend you move to LED lights as they are going to last much longer than the incandescent lights on your horse trailer. As far as light output, Optronics generally measures their lights in candelas instead of lumens though at a distance of 1 foot candela is equal to lumens so you should have a good idea of how bright the lights are. I contacted Optronics and the representative was able to give me the candelas of each of the lights you were asking about. The incandescent # BU70CB...
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