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Tail light and blinker problems?

Tiny
DCCHALLENGED
  • MEMBER
  • 1990 CHEVROLET SILVERADO
  • 190,000 MILES
When you turn on the headlights there are no tail lamps. If you turn the blinker on while the headlamps are on the side you turn on bright comes on but doesn't flash. If you turn the headlamps off the rear blinker will work but is dim. The hazards work all the time.
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Tuesday, November 29th, 2011 AT 10:03 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
This sounds like a bad ground at the rear of the truck which is common. Check the headlamp switch and turn signal flasher. Here is the wiring diagrams so you can see how the system works. This guide can help as well.

https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out

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Tuesday, November 29th, 2011 AT 10:48 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Ck. The turn signal and parking fuses with a test light. Then check the voltage at the sockets from the switch. Its a bad fuse bulb or socket. If your getting power to the socket and the bulbs are good. Next replace the flasher unit.
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Wednesday, November 30th, 2011 AT 12:06 AM

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