Question about RVs
The running lights and brake lights circuits were both designed and installed by Ford. The E-350 chassis was used for a variety of vehicles, from cargo vans to RV and light utility trucks. The rear lighting will be the same schematic for these vehicles.
Schematics for these vehicles can be found in most public libraries, in technical or "shop"/repair manuals for almost every vehicle ever made. If your are not familiar with these manuals, ask a librarian for assistance in find the correct publication for a 1985 FORD E-350.
The RV manufacturer probably spliced into the Ford wiring for the rear lights on you vehicle. The fuses for both circuits should be under the hood.
If your brakes lights don't work, your cruise control should also stop functioning. The cruise control gets it's ground by being wired into the positive side of the brake lights. The ground is actually supplied across the filament of the brake light bulb. When power is supplied to the brake lights the cruise control loose it,s ground and stops working..
Get a manual from the library, and you should fix two problems at the same time.
Posted on Dec 27, 2016
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Posted on Jan 02, 2017
Make sure that the rear light fuse is not blown
If not trace the brown wire from the rear lights & check for continuity between lamp holder & fuse
As its both rear lights & front sidelights it will not be an earth fault
Hope this helps (if so please mark as very helpful)
Posted on Apr 15, 2010
You have two brake light switches. One is in the right handlebar switch housing. Make sure your front master cylinder is slid all the way down against the switch housing. Check the lever and pivot pin for wear. If the front brake lever is loose and wobbly, the lever is worn and is not making the switch in the front switch housing. You can move the master cylinder away from the switch housing, move it up on the handlebars, and check the switch. It has a small plunger sticking out that is operated by a flat spot on the lever. The second switch in behind the engine. Find the metal brake line coming out of the rear master cylinder and follow it back towards the rear brake. You'll find a pressure switch in the line. Pull the wires off the pressure switch, if the light stays on, your front brake light switch is keeping it on. If the light goes off, the rear switch is bad, check it with an ohm meter. Contact me directly at email@example.com and I'll send you a schematic. Remind me of what you need.
Posted on Jul 12, 2011
Check to see if the brake switches on the brake levers aren't sticking or its just a driving light that stays on permanently
Posted on Dec 31, 2011
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