72 GMC Brake light Probems

[Chevy 350 Fan]

Originally Posted by kwmech

Check the plug at the steering column connector. When you step on the brakes, the white wire from the brake switch energizes up the steering column. From there it goes through the TS switch and powers up both the yellow and green wires going to the respective bulbs. So check the yellow wire at the connector when you push on the brake pedal. You can also alligator clip a powered jumper lead to the yellow wire with the plug disconnected and see if you have a brake lamp. May have a bad turn sig switch

You were absolutely right! it was the white wire (bad connection). Thanks A lot!!!! much appreciated.