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7-Way Round Pin to 7-Way Flat Blade Adapter W/Compatible Brake Controller To Control Trailer Brakes

Question:

I purchased a 7 round pin to 7 blade however when I plugged the adapter I the turn signals work and the running lights also but the brake light dont come on and the brakes are locked on, how do I remedy this and also I need to add a brake controller, how is this to be wired? Thanks

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Expert Reply:

As your 7-Way pin connector uses separate turn signals and brake light wiring you will need the to create a custom harness to be able to have everything function properly including the electric brakes. First you will start with the Pollak Heavy-Duty, 7-Pole, Round Pin, Trailer Wiring Connector # PK11700 to connect to your vehicle. You will be able to connect the Hopkins Tail Light Converter # HM48847 and Hopkins Endurance Quick-Install 7-Way Trailer Connector # HM47210 to the appropriate wiring connectors. I have included a diagram below for both the types of 7-ways as this will help you to ensure you use the correct terminals for all the wiring. The Hopkins converter will take the 3 wires for your turn signals and brakes from the 7-pin and combine them into 2 wires for the 7-way blade connector.

To control the brakes you will need the Hayes Air Actuated Trailer Brake Controller # HA100400C. The wiring will need to be ran to the adapter you are making as you do not have an existing wire for it to run through for your existing 7-pin.

7-Way Vehicle Side Connector Wiring
7-Way Vehicle Side Connector Wiring
(click to enlarge)
7-Way Pin Connector Wiring
7-Way Pin Connector Wiring
(click to enlarge)
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Gregory M

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