7 Prong Trailer Diagram. I hooked up to my trailer for the first time yesterday and no electric brakes. If you only tow the trailer with that truck I would suggest changing to a seven pin connector on the trailer.
For example, a valve, a motor might need to be controlled to operate for a particular interval of time, switched ON after some time interval or after some delay. You have coil ignition not magneto. In many older homes in the United States, the outlets are of the two-prong variety.
I was wondering if there was a diagram available.
I traced the wiring back to the engine compartment and found a blue wire that was not connected.
Never replace a two-pronged outlet with a three-pronged outlet while the circuit is hot. In many older homes in the United States, the outlets are of the two-prong variety. It would appear you also have a problem with the left trailer brake.