Convert 4 Pin To 7 Pin Trailer Harness

Convert 4 Pin To 7 Pin Trailer Harness. The adapter connects tail lights, brake lights, turn signals and reverse lights. There should be a common color for both the tail lights.

ONE-7 WAY TO 4 PIN TRAILER ADAPTER WIRE LIGHT PLUG TC2074P ... (Ralph Nash)

Seven-pin connectors are rarely used on trailers for local use. Cut the four-pin plug off of the trailer harness. My trailer has hydrolic brakes put are deactivated when in reverse by the fifth wire in the harness.

Cut the four-pin plug off of the trailer harness.

The adapter connects tail lights, brake lights, turn signals and reverse lights.

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The PCM would control the A/C recirculation to help cool the a/c system if it got too hot. Verify the harness color codes at each tail light. My question is, does anyone have an directions to make a harness.