I am trying to figure out which fuse goes to the running lamps on the trailer. The blinkers and brake lights on trailer both work just not the running lights.
Unless I'm mistaken, there is no fuse dedicated to the trailer lights - they're wired directly to the matching truck lights - the running lights & taillights should be wired directly to your truck's taillights.
Check your trailer wiring from the truck plug all the way back. I've seen lots of poor connections in the truck plug, as well as any of those squeeze splices you might have in your trailer. Look also at the ground wiring for your running lights.
SOURCE: LEFT TRAILER TURN SIGNAL DOES NOT WORK
I'd get a 12vdc test light if you don't have one already & start from plug, and keep probing back from there. It may be as simple as a bad connection under truck where joined into harness.
SOURCE: 02 RAM 2500 no power at trailer plug
It should have a fuse for the marker lights. Do they work on the truck. Brown is the color for the marker lights. Good Luck
SOURCE: 2001 Dodge Ram 2500, no running lights on trailer
The truck is protecting itself from the load impose by the trailer.. Chk the plug on the truck for wire gauge size. Turn any electrical loads off on the trailer, any and all. If fuse still blows then the fuse is either underated or the trailer has a dead short. In fact turn trail main power panel of. All lights work you say. So ck the inverter for defect byturning off the inverter on one of the trailers.
SOURCE: LEFT TRAILER TURN SIGNAL DOES NOT WORK
I have seen once before that the fuse box was bad on a 2003 Dodge 3500. I had power in and nothing out. We had to replace the box. Not cheap! Hope it is simple like a loose connection though. I think I had to pull the inner fender on the drivers side to access the bottom of the fuse box. Pain in the ****, but...
SOURCE: 2004 dodge ram 1500 slt wiring diagram for hooking
Try http://www.etrailer.com/faq-wiring.aspx. If it is factory installed, there should be a plug in next to/behind the parking brake pedal... at the top. Not easy to see or get to.
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Hi You may have a bad relay in the fuse box on your truck, Mine had the same problem and it had a bad relay for the left side. There are two relays for the trailer wiring. One for the left side and one for the right side. You can move one too the other side and see if the problem changes sides.
Hope this helps.
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