Brake Light Question

[seth_rt10]

Hello,

Holiday weekend project time: my wife has noticed that my 1994 RT/10's brake lights stay on intermittently (most often at freeway speeds, for some reason). I don't notice any change in the car's acceleration, so hopefully the brakes aren't actually engaging.

I have already replaced the brake light switch (https://viperpartsdepot.com/products/brake-light-stop-lamp-switch-viper-95-02-oem), and the problem persists. Where would you look next?

Thanks!

 

[Goggles Pizano]

Brake lights or rear running lights. You need to be clear on which one. Both sides, one side?

If during driving, probably going over bumps and shorting a wire/connection.

 

[seth_rt10]

Hey, thanks for the reply! It's the brake lights. All three light spend time illuminated when I'm not braking, but it's intermittent. It could be due to bumps, but it seems to mostly occur on highways, which are fairly smooth.

 

[Goggles Pizano]

Bumps, vibration same results.
You can disconnect the brake switch and go driving in the evening or less busy hour and see if it does it.

 

[MoparMap]

My mom's 94 does something similar. Almost every time she hits the clutch the brake lights will come on as well. The two pedals are on a common pivot and I think over time the bushings get a little sticky so when you press the clutch it actually drags the brake pedal along with it just enough to trigger the brake lights. Seems overly sensitive on the switch, though maybe that can be adjusted. Wondering if you might have something similar going on where the switch is right on the edge of triggering at the neutral position so any movement engages it.

 

[Goggles Pizano]

^^^ only thing I got from that post was mom is/was cool.

 

[MoparMap]

She still has it, lol. She was the reason I got my 04. Drove hers a few times and thought it seemed fun, but I wanted a roof and windows because it was going to be my daily for work. She wanted one ever since they came out and finally managed to find one. There's something about the early ones that are just really fun to drive. Mine is better in almost every way as far as performance and comfort and stuff like that, but hers is just special.