Holiday Rambler Aluma-lite brake and blinker lights

Does the horn work? Often times both of the rear brake lights and the horn are on the same fuse. Chances are pretty good that your rear turn signals and brake lights are using the same bulbs.

Good to know Year/Make/Model of the Coach, but we also need same for the Chassis. Chassis may be a model year (and usually no more than one model year) earlier than the Coach was sold and titled as.

Do your bulbs look like this and push into the sockets?


Or like this and push/twist in?


Never mind they're Amber, just the first pix I found... Note that they only seat in the sockets one way. What I really want to know about the sockets: Is there enough metal near/part of the Socket that you can connect a temporary jumper to a known solid ground, like trailer hitch, to make sure original ground hasn't failed?

Also, CHASSIS builder made up the FRONT light circuits but COACH builder (sometimes called UpFitter) connected the REAR when they installed the House onto the Chassis. Could be a Splice or Connector. Some Chassis (at least Ford I'm familiar with) have separate fuses Front and Rear, and some have more, called Trailer. The House could have been connected as Trailer.

Are the Marker and License Tag Lights coming on with Park/Running Lights? You said "tail and backup" were OK but look up at the Markers too.

Got Owner's Manual? You may have missed a blown or loose fuse.

Done/Plugged anything electrical beside change bulbs?

It is a 2011 Ford chassis built in Dec 2010 according to the sticker. Bulb is the flat base style. All marker lights work and just tried the horn and that works. Looking around "THE INTERNET" It looks like it could be the multifunction switch but haven't seen where that has shown up as the problem on a 2011. I only have 9000 miles on it so it shouldn't be worn out.

Since it is 2 sockets, I would first look to the grounding of the rear light sockets. A single wire disconnected or broken can do that. If it was the hot wires, it would have to be 2 wires disconnected, the one for the right side AND the one for the left side. While it is possible to be the 2 hot wires, it is far less likely.

Turned out to be fuse no.26-trailer conection. Took it in to the dealership (Ford) and it was a blown fuse from the trailer conection. They had said it was wired wrong and that was the cause so the rewired it and all is fine now. Seems as if they had the taillights wired to the trailer conection and then wired trailer wires off of that. $280.00 which I didn't think was to bad for the time spent on it.