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Re: 96 Chevy 4x4 Break lights don't work and fuse is good
Have you checked the brake light switch under the brake pedal? It may be out of alignment with the pedal lever or dislodged from it's connector. If it is still in the right position, check if pedal travel compresses the switch, if not adjust it so it does. If everything is in order and it still doesn't work, replace the switch. Hope this helps. Best wishes.
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Everything works, more or less, so you know that the switches and fuses are good. That means that you've got either bulb problems or power/ground problems. First, try swapping the bulbs around to see if the "bad" lights will work with the known "good" bulbs in them. If so, you just need to replace some bulbs. If not, check the sockets inside and out for corrosion, clean them (wire brush, steel wool, sandpaper, etc.) if necessary, and use a voltmeter or automotive tester to make sure that you have power and ground to each socket. The fast flash on the turn signal is just an indicator that a bulb is out.
Check the brake light switch should be a orange wire with 12v then a white wire with 12v when the pedal is pressed.If htat cks good then ck the hazard switch by moving it up and down and wiggeling the knob with the brake pedal pressed if they start working then your multifunction switch is bad and needs to be replaced.
Not even the third eye? then the fuse is blown or all the bulbs are out or the brake light switch on the break pedal is bad wire off or broken( it breaks right off the plug then crosses then blows the fuse as the loose broken wire hits the brake pedel arm. Test the break pedal switch first if the third eye doesesnt work either. no power with a test light the fuse is blown or the wire broke ( the wire goes straight to the switch from the fuse and doesnt go anywhere elese. the other wire if hot should light the lights. Most of these wont come out of park without this working as the wire also turns on the park release but some Fords the park release sticks released and Ford made em that way as they didnt like the brake to get out of park law. If the brake lights dont work maybe you ought not be able to get out of park anyway till its fixed. the switch is hot on both wires with the switch pused down and the lights dont still work go after the third eye first if the bulbs are bad change em before you do the rest of the work. on cars with yellow turn signals the brake lights all work on the same wire but red only use three wires, but you didnt say the turn signales didnt work if they work and they are red you r on the way to the turn signal switch as the brake switch powers the turn switch with power then it splites it fot the two lights and adifferent switch circuit for the front hooks them all together for hazard. yellow turns in the back or even separt bulbs can mean blown bulbs ther too its old enought for all the bulbs to fail and the runs still work.
You might have a bad break light switch. It is in the break pedal area. If you probe the wires on the switch one should be battery voltage. If no voltage then the problem is most likely a fuse. I don't know exactly which fuse it is. If you have power at the switch then check the other wire and see if it has battery voltage when you press the break pedal. If you have power when you press the break then there is a problem with the wire going back to the lights or the circuits for the directional sighal/emergency circuits because they are also using these lights. I hope this helps you to at least define the a possible cause.