Trailer Brakes
As per another thread, I have yet to change out the 7 pin cable. Prior to doing so, I decided to confirm whether the old cable is still usable. I hooked up the 7 pin to the truck (which recogniz...
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Gdetrailer wrote:Grit dog wrote:
To see if the trailer side is good, jump 12v to trailer side pin for the brakes. Should lock them up tight.
Your truck sounds fairly new. Is there a readout for trailer brake gain?
Don't have to "jump" anything, just pull the emergency breakaway pin then pull forward.. Break away system overrides the vehicles system (vehicle brake controller, wire and socket).
All wheels must lock and hold when break away system is activated.
Break away switch supplies full 12V from the trailers' on board battery.
If break away system does not lock any wheels then you must troubleshoot and diagnose the TRAILER electrical system and the mechanical part of the brakes behind the drums.
If break away locks all the wheels then consider changing the 7 pin connector and cable.
You have a 99% chance the trouble is not the vehicles fault but folks love to blame the vehicle for everything.. :R
Great tutorial but does nothin to diagnose a short in the trailer plug or pig tail, upstream of the breakaway system.
