got turn signals and hazards, but no brake lights

[Chance C]

Not sure what the problem is, but I tried getting to the switch but can't get close enough to it. any tips?

 

[Roadrunner777]

I'll give you what I have... this is all from a '94 book, so it may not work for you, possibly different wire colors... but here's hoping!

Power path:
Your last known good power in the path is at the hazard blinker, since they work.
Power goes from the hazard blinker to the brake switch on a LIGHT GREEN/RED wire.
When the brakes are applied, power passes through the switch to a LIGHT GREEN wire.

Now, this is your first test point, and it's an easy one. If the third HIGH MOUNT STOP LIGHT works, then that proves the switch is working.

If the third brake light does not work, that doesn't really prove anything because it could be burned out or have wiring issues of it's own. But, if it does work, then we are good through the brake switch. If it doesn't, then maybe it's worth replacing the lamp, just to be sure. I'm just saying, if the third light works, you can forget about the brake switch as a cause.

Now, there is a second LIGHT GREEN wire that is powered with the brake switch, and it goes to the multi-function turn signal switch group.

From the multi function switch, there is a LIGHT GREEN/ORANGE wire that goes to the left rear brake lamp, and an ORANGE/LIGHT BLUE to the right rear brake lamp. Since the hazards work, that proves out these runs.

So... shorter version:
1) If the HIGH MOUNT STOP LIGHT works, then it's most likely a problem in the multi-function switch.
2) If the HIGH MOUNT STOP LIGHT does not work, it could be the brake switch, the multi-function switch, or the light itself. The only way to tell for sure is to probe the wires at the multi-function switch, which is easy to get to once you get the steering column plastic off.

The brake switch is cheap... $10 or so, and it's not a horrendous job once you get your body twisted to get to it. It took me an hour, and I'm slow.
The multi-function switch is about $50, and much easier to swap out.

Hopefully, these 1994 color codes are the same for a 1991... but I don't know that.

Good Luck!!!

 

[AGodlyCanuck]

If its anything like mine... Connected popped off at the brake switch where the brake pedal mounts under the dash.

 

[csmall88]

I have been looking for an answer for soooooo long. My 92 brake lights work, and the turn signal works, only one flasher works, but if I put my foot on the brake with the turn signal on 5/10 times the opposite brake light will cut out. And I just replaced the high mount brake light bulb so we will see if it actually works. Any ideas?

 

[ks54703]

This summer followed spouse in the 94 Limited she had no brake lights but had turn signals. When she got back backed up to garage door with windows to check again they worked, spouse got in they did not work. Just a difference in pedal pressure between us made the brake lights work or fail. No rocket science changed out brake light switch on brake pedal all good now. Ohmed it out on bench did not seem any different than new unit. Go figure.
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94 Limited

 

[csmall88]

This summer followed spouse in the 94 Limited she had no brake lights but had turn signals. When she got back backed up to garage door with windows to check again they worked, spouse got in they did not work. Just a difference in pedal pressure between us made the brake lights work or fail. No rocket science changed out brake light switch on brake pedal all good now. Ohmed it out on bench did not seem any different than new unit. Go figure.
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94 Limited

thanks. this helps a lot. the brake switch is the only thing I haven’t replaced yet