Stumped! - brake lights won't work, but bulbs are good?? Advice/help please
I have a 1989 GMC Sierra c2500. When I press on the brake pedal, my brake lights do not come on. At first I thought the bulbs were burnt out, but when I took the bulb out and tested it with electricity it lit up just fine. My hazard lights use the same bulbs as the brake lights and my hazard lights work just fine. My turn signals work great too. But when I step on the brake pedal, I get no brake lights. I have replaced the brake switch under the dash. I have also replaced the neutral safety switch under the dash too, checked the fuses to make sure they were in good condition, and still nothing. What else could I be overlooking and or what else could be the problem?? Any help or advice would be greatly appreciated.
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Also brake light switch wires run up to the turn signal switch and then back out.....also do you have power going into and out of the brake light switch?....also CHECK FUSES!!!!! it sounds stupid but you would be surprised...most trucks have a stop light fuse or relay in them....and a combination stop/turn fuse....check for these you may find an easy fix.
Thanks everyone for all your suggestions and help. I was unable to trace a broken wire, but what I was able to do to temporarily fix the problem was put a jumper wire in the brake light switch from orange to red. I used a volt meter to make sure the brake light switch was getting power and the reading was positive... so I'm not sure why or how it won't work by itself because it's a brand new brake light switch. But with the jumper wire in there my brake lights work perfect.