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Brake lights inop

Tiny
JON WILLIAMSON
  • MEMBER
  • 1994 GMC SIERRA
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
Brake lights work when tilt wheel is in up position but quit when tilt wheel is in down position. However brake lights on aftermarket truck cap work no matter where tilt wheel is positioned.
Wednesday, August 31st, 2016 AT 8:29 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check turn signal switch for broken or chafed wires in position that lights don't work or just replace the switch and it will be fixed.
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Wednesday, August 31st, 2016 AT 9:41 AM
Tiny
JON WILLIAMSON
  • MEMBER
  • 2 POSTS
OK but it's a multifunction switch and quite expensive for an old truck, how do I ck the wiring? Does steering wheel have to come off?
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Wednesday, August 31st, 2016 AT 5:43 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Yes steering wheel and air bag if there is one has to be removed. You'll need a special tool to remove switches see instructions, auto parts might rent it. Check wires marked at switch connection to see if it is going through these with brake light on.
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Thursday, September 1st, 2016 AT 6:22 AM

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