TV charging cord not working?
Just picked up my TT from the shop and we discovered that my plug from our Expedition isn't charging the trailer battery. We checked the fuses which were all good. Any chance there's a different s...
Forum Discussion
acritzer wrote:BFL13 wrote:
Fords have an isolator so unless the engine is running, you have no path via Pin 4 between trailer and truck battery. (Chevs don't, so Pin 4 is always live if Stud 1 fuse is in.)
Sounds like they don't have Pin 4 on the isolator.
The engine was running.
The fuses are there. But I don't know about a relay. I would have assumed the charge line came automatically with the 7 pin install.
You can get a 4-pin adapter for a 7-pin, but you can't make a 7-pin from a 4-pin. You have to start from scratch with a 7-pin.
