Trailer Wiring Adapter 4 Pin To 5 Pin. Tested the output at the receiver and everything works, plug in an adapter and only turn signals work.no taillights. Cut the four-pin plug off of the trailer harness.
The condition and materials used will play a large. To install you simply remove your driver side tail light, locate the wire. Seven-pin connectors are rarely used on trailers for local use.
To install you simply remove your driver side tail light, locate the wire.
This arrangement is used on all relevant Canford manufactured products.
I use one all the time and have had no issues, its possible the adapter. Verify the harness color codes at each tail light. Are the trailer tail lights LED?