My rear passenger side blinker doesn't work. Brake light on same side doesn't work, but the regular light does. I changed the bulb already thinking it was that filament, but no. The dash flashes normally and the front on the same side works. Bad socket? thanks

 

could be a bad socket, or a bad pigtail in the socket, or even a pinched/cut wire from the cab to the light.

 

would a cut/ damaged wire allow half the bulb to work?

 

Check your ground!!!!

 

I'll recheck the ground. thanks

 

Refill the Blinker Fluid Resevoir.....Sounds like its low...



































ROFLMAO

 

Check the bulb...(I'm being serious now)...

If its a 3156 bulb, they have a single filament...3157's have a dual filament.....

Just a SERIOUS thought....

 

there are 3 wires going to the rear light.
running light wire
blinker/brake light wire
ground wire

 

Blinker fluid is full sidewinder
It's a 3157 bulb, so I'll follow the wire that runs the blinker, Thanks

 

Dual filament....Check the bulb; See if one of the filaments is broken....