digitalvice

92 eg6.... checked bulbs they were fine, replaced them anyways. now im looking at the brake switch. it seems to engage but i've lost the clicking noise it makes which leads me here. before i buy a new switch i wanted to know if there were any other possibilities, either the fuse or something else. whats weird is i replaced the drivers side front wheel bearing yesterday which is when my lights cut out. tail lights, turn signals all work.

doctorake

You check the fuses?

Former User

Does the horn work?

digitalvice

the horn hasn't worked for months...i thought that was due to my dash harness being hacked to **** when i got it, also leading to no clock or stereo. and yes i did check my fuses there are 3 20's in the middle of the bottom row that are showing no power. the rest are fine. im looking through the service manual now to find out what they are

Former User

The horn/brake light fuse is located in the hoof fuse box -- 20A fuse #42.

digitalvice

ok i will check them now.

digitalvice

ok so i have ran a check on the fuse its fine... managed to get my radio and clock working again, but no brake lights or horn

digitalvice

bump...i have replaced my brake light switch with no luck. my brake lights are still out as well as my horn. also replaced fuse #42 used a volt meter everything looks good. any ideas?

Former User

Does #42 have voltage on both top test tabs?

Does voltage reach the brake light switch on the pedal?

digitalvice

yes. i checked the voltage on both tabs and the switch when i replaced it this morning. could it be a ground?

Former User

And the answer was...?


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Does the car have cruise control?

digitalvice

it has voltage at both tabs and at the switch. i did read somewhere that the cruise control could play a factor. i took the car around the block about an hr or so ago and put the cruise on, it turns off when pedal is depressed

Former User

As you have cruise, the next question is did you probe for voltage on the power wire for the brake lights? Which specific pins in the switch connector have voltage?

digitalvice

the power wire has voltage. it read at 13.84 could that be the problem? also i tested a and b. on the connector. top 2

Former User

State voltage readings for specific wire colors.

Pin B in the connector is the power wire for the brake lights.

digitalvice

green/white 13.84;
grey 4.0 without cruise switch;
12.1 with cruise switch on;
light green 13.46;
light green/black dots 13.83
green & green/white (plugged into the same slot) 12.6

digitalvice

pin B is the green/white

Former User

Good. With brake pedal pressed down, now check whether voltage reaches the Grn/Wht wire terminal at each brake light bulb receptacle.

Also run power and ground wires from the battery posts to the horns to see whether they sound.

digitalvice

i will run the tests now.

digitalvice

the most i would get is from .8-3.0 but no lights. the horn doesn't work either. i think its actually broken.

Former User

The horn is broken. Replace it.

What did you use for ground in your voltage test in the receptacles? Compare the metal chassis versus the brake light ground wire. If both grounds yield low/no voltage, then the Grn/Wht wire running between the brake pedal switch and the rear receptacle is broken. You can either locate the break and fix it, or run a new wire.

digitalvice

i used the G553 ground bolt.

Former User

Try using an adjacent clean metal area of the chassis, just in case the G553 bolt is corroded.

digitalvice

same results. also pulled the interior quarter panel out and traced the wire to the switch and there is no frays or shorts. there is just no power through that wire. but there is power at the switch terminal. confused...

Former User

Does voltage reach the Grn/Wht wire at the point where the connectors link the dash and floor harnesses? The general strategy would be to test for voltage on the wire at points close to the switch and then to move farther away until no/low voltage is detected. That should help pinpoint the break.