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I have a brake light out and changed the bulbs. Still not working. I'm looking at the fuse box next, but don't know what fuse it is??? Can you give me some instruction on how to read the fuse box template? 2000 Chevy Blazer 4WD
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Buy a cheap multimeter and measure your voltage at the bulb when the brake lights are supposed to be on. You should have 12vdc. Is your 3rd brake light and brake lights on the same fuse? If not, measure to see if you have 12vdc at the fuse itself.
If some of the lights work then you probably don't need to change the light assembly. My first guess would be a burnt out fuse. Look for the fuse box and remove the cover. Usually on the inside of the cover it will have a diagram for all the fuses and you can find the one for the brake lights. Some vehicles have relays that are fried and these may be under the hood. Just look for a black box which contains electrical relays and other fuses. The last thing I can think of is a switch that is right above the brake pedal. When you apply the brake a small plastic or metal extends and this is what makes your brake light come on. www.lightdeal.co.uk
I don't believe there is a separate fuse for the high-mount brake light. Never was on older cars, that brake light is just spliced into the rear brake lights. Have you checked the bulb?
Hi, your van does not use the signal filaments for the brake lights. You must have a wiring issue. Check for power at the brake light switch. If you have power there, the wire is broke from the switch to the S304 junction. If there is no power to the switch, the wire is broken between the fuse box and the switch. Please let me know if you have more questions, and thanks for using FixYa.
brake switch on the pedal bad.bad relay. do you have a second fuse box if so check it. look at the wiring see if it is frayed or chafed check the connections.check all the fuses not just the ones labeled brakes.switch the relay with one that you know is good like turn signal and see if the turn signal works then check brakes.use a 12 volt test light check the brake switch and probe the wires. hope this helped if not write back and i'll give you more ideas.
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