Running light don't work-2010 Class C Winnebago Ford 450

Removed every fuze and found the one that was blown, it was the trailer backup tial power. Never heard of a trailer haing a backup lights. But it fixed not. Oh it was under the hoor fuze box area, slot 58. Hope this helps someone else one day! THanks for all your comments and help.

You might also check to see if the manufacturer installed a relay to activate the running lights. The headlight switch was originally designed to run headlights, side markers and taillights on the vehicle, not 8-12 more running lights.

Too much amperage through the light switch was a common problem for RV's for many years until they started using relays.

Here is the link toWinnebago wiring, There are Ford fuse blocks under the hood as well as under the dash, if a fuse most likely Ford, but why.

Ken

You can get wiring diagrams from the Winnebago site. Just as a tip, some coach builders connect the house body (stop, turn, running) lights up to "trailer" wiring harness of the chassis. So check that circuit and fuses too.

It is a Winnebago Motorhome, 2009 Ford F450 frame. All lights work, just not the running likes. Have checked every fuse in the whole system.

Is this a trailer or a motorhome or a truck camper?

Regardless, you have a bad or broken connection somewhere, or a blown fuse that you haven't checked. It could be a ground connection or a power connection. If it's a trailer or truck camper, the obvious first place to start looking is at the connections between the truck and the RV. If it's a motorhome, there might be a good deal of hunting around to do to find the problem; if you can get a wiring diagram, especially one that shows the wire routing, that might be very handy.

For motorhomes, occasionally they do odd things like wire the running or other lights to the trailer light circuits of the chassis.