Brake lights not working on e450 ford class c

To the OP:
Have you found any of the posted replies of help to you?

To The Moderator:
Thank You!

What Hank said is interesting. Many Fords have their stop/tail/turn lighting circuits PLUS a set of Trailer circuits. We've run into Class C's that had the rear lights connected to the trailer wiring. You could also, and easily, have good ground on one corner and weak/failed ground on the other.

Have you checked fuses? dont know year model of yours but fuse 11 on an 06 e350 controls the brake lamps

Fuse/Relay
Location
Fuse Amp
Rating
Passenger Compartment Fuse
Panel Description

11 15A Multi-function switch (hazards),
Brake lamp switch, Brake lamps

DrewE wrote:

wbwood wrote:
We have an e450 where one of the brake lights do not work when brakes are pressed. Tail light works fine. Changed bulb to no avail... any input on that?

You've already done half the troubleshooting, I think.

Working tail light implies that the ground is (probably) good. Working brake light on the other side means that the wiring from the front of the RV to the back is good. The problem logically has to be either the socket or the wiring between the two brake lights. (I'd also check that the new bulb is OK, just for kicks, before diving in too much deeper. It's rare, but far from impossible, for brand new light bulbs to be bad.)

I did check that....the new bulb worked in the other tail light...

wbwood wrote:
We have an e450 where one of the brake lights do not work when brakes are pressed. Tail light works fine. Changed bulb to no avail... any input on that?

You've already done half the troubleshooting, I think.

Working tail light implies that the ground is (probably) good. Working brake light on the other side means that the wiring from the front of the RV to the back is good. The problem logically has to be either the socket or the wiring between the two brake lights. (I'd also check that the new bulb is OK, just for kicks, before diving in too much deeper. It's rare, but far from impossible, for brand new light bulbs to be bad.)

We have an e450 where one of the brake lights do not work when brakes are pressed. Tail light works fine. Changed bulb to no avail... any input on that?

Hmmmm ... Do I dare jump in here? Not Yet!
I’ll just subscribe to this topic, awaiting ANY feedback from the OP regarding these excellent replies - -
BEFORE offering up "an unusual fix" for a bad turn signal problem I had.

Most common with rear light failure is ground wire. Look for a bad connection where ground wire is connected to frame.

Are your running side lights working?

Check the wiring on the running lights. Crawl underneath and take a look at how they run those wires!

They cross them over and under the frame around the axle from side to side with multiple splices and zip ties.:R

That's where I found my wiring problems.

Bad wiring contact at light bulbs.