Blowing Fuse on Tow Vehicle

[btritschler1437]

I have a 2013 Ram 3500. In the last two days, seems when I hook up the 5th (325res) I blow the fuse on the truck that controls the lights on top of the cab and on the fenders. Any suggestions, it is a 15amp.. All the lights on the trailer work fine. Thanks in advance.

[rockfordroo]

If the fuse blows, how do you know the lights all work fine? Sounds like you have a short somewhere. It could be some place where the wires are being pinched (you'll have to trace all the wires, a potential PITA). Or it could be one of the lights has blown and shorted itself out in the process. Doesn't happen very often, but it does happen.

[markb5900]

You have a dead short somewhere.
Start at the 5th wheel plug and work back till you find the wire that is bare and shorting to the ground on the truck.

[rracer5]

Originally Posted by btritschler1437

I have a 2013 Ram 3500. In the last two days, seems when I hook up the 5th (325res) I blow the fuse on the truck that controls the lights on top of the cab and on the fenders. Any suggestions, it is a 15amp.. All the lights on the trailer work fine. Thanks in advance.

Are you saying that even after the fuse blows, ALL the clearance lights, side marker and tail lights on the trailer stay lit?

[donanddona]

How old is your 5r? The 5r cable (not connector) could be faulting.

[TURBS]

Originally Posted by rockfordroo

If the fuse blows, how do you know the lights all work fine? Sounds like you have a short somewhere. It could be some place where the wires are being pinched (you'll have to trace all the wires, a potential PITA). Or it could be one of the lights has blown and shorted itself out in the process. Doesn't happen very often, but it does happen.

Camper fuses are separate from truck fuses.

[TURBS]

Almost all newer trucks us separate fuses for a towable.
That way if your camper has a short your truck stays lit.
Or visa versa

This goes for turn tail and stop.


Sooooo it's most likely in the truck wiring.