Turn signals don't work. it just started. Its a 1988 e150 4.9L. everything else works fine head, tail, brake, and hazard lights all work great. Just replaced both buss flasher/ blinker fuses and the bulbs look fine, also cleaned the contacts where the bulbs sit. No clicking, no dash blinker lights.
Suspect the multi-function switch. (turnsignal) these fail a lot.
SOURCE: 2001 dodge neon tail lights inop
looking at your schematics and , you say tail lights don't work , you didn't mention if front parking lights and license plate lights are working , they all come from the same source , a black /yellow wire , a good clue if front work and rear don't , please advise .if fronts work then you have a open circuit somewhere between junction S118 (near breakout for left headlamp) and rear sockets.
SOURCE: 99 Rodeo Right turn signal makes brake lights blink
TURN SIGNALS WILL FEED BACK THROUGH THE TURN SIGNAL SWITCH.THEY ARE INDEPENDENT OUT SIDE ON THE CAR BUT NOT IN THE SIGNAL SWITCH.REPLACE THE SIGNAL SWITCH
SOURCE: 1997 Chevy Tahoe both turn signals stopped working
Sounds like the flasher unit to me. Normally the emergency flasher and turn signal are separate.
SOURCE: 99 Chevy Tahoe... Rear turn signals, brake lights, and hazards
I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!
SOURCE: 87 celica. tail lights do not work, but brake and others do
Check the tail light failure sensor. Located in the driver's side kick panel fuse box. ~Rick89GTS
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