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Why would a 88 Chevy truck have rear running lights working but brake lights and rear turn signal lights not working?
Wiki User
∙ 14y ago
The brake lights and turn signals are on a separate circuit of their of their own and thus independent of the tail lights and side marker lights ["running"] lights.
There could be several causes for this problem, and without being able to see and troubleshoot the brake light wiring circuit no one can tell you the specific cause.
Some of the possible causes include:
- Brake light switch is not adjusted properly.
- The fuse for that circuit is "blown" out.
- A wiring harness connector anywhere in that circuit has become unplugged, or loose.
- The ground wire or wires for that circuit have become disconnected, or the connection of the ground wires to the vehicle's grounded body sheet metal has been blocked by corrosion.
- A wire in the circuit has been cut, broken, or pulled loose.
- The brake light switch has become defective.
There are probably a few other causes I have forgotten about.
Wiki User
∙ 14y ago
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