F
fish face
This is good advice.Lots of resources at etrailer.com. Diagnostic tools, instruction videos.
With a cheap (sometimes its the free item) multitester from Harbor Freight, you can test the voltage of each pin on the truck, and do a continuity check from each pin on the trailer side.
HFT also sells a little gizmo for under $10 that you plug into your truck and it tells you which is working or not. The catch is they only have if for a 4-way flat connector so it won't help diagnose a 6-way or 7-way. Actually, they also have an adapter for a 7-way that you can use to connect a trailer with a 4-way, and you could use that with the tester.
But really, you need to know how to use a tester anyway, to make the repair.
A lot depends on how the trailer is wired, as well as how the truck is wired.
Also, something something something LED lights different something.
That could complicate things.Yup it does. its not wat I suggested
Sent from my XT1034 using Tapatalk
Wow. It takes a lot to blow a 20 amp fuse.Found the problem. It was a blown 20 amp fuse. I got lucky. Thanks to all who responded. I have learned a lot!!