Hi all, I Have an E350 RV that the rear turn signals don't work, running lights work. The front signals work but flash really fast. I also noticed the cruise control stopped working and my ABS light came on too? Need some direction on this, all fuses okay. Please help. Thanks and have a great day. Jer

 

check the plugin's on the harness down the frame rail. sounds like one is loose or corroded to me.

 

Like Renagade sez, it's probably a wiring problem, but what happens when you turn on the emergency flashers which use the same bulbs & wiring?

 

The emergency flashers don't work on the rear only on the front.

 

In that case run a long wire from the negative post on the battery(or any other ground) turn on the flashers & connect a voltmeter between your temporary ground wire & the center electrode of the bulb socket. If you get 12 volts the problem is an open ground circuit. Do you have a wiring diagram?

 

Do the rear brake lights work? If they do, that means all the wiring from the steering column to the rear lights, and the rear light bulbs are ok. I vote it's the multi-function switch if this is the case.

 

I think that Franklin2 just solved your problem. I forgot that turn, e-flashers & brake lights are al wired to the same filament in the same bulb.