A few weeks ago, I started having issues with my emergency brake light indicator coming on when I would try and use ac and when I tried to roll window up/down. For a min it wasn't all the time but now it is all the time. Any suggestions would be much appreciated. Thank you in advance.

 

What are you driving?

 

1992 dodge w150

 

Going to move this to first gen Ram section for ya.

Sounds to me like a bad ground somewhere.

 

actually sounds like a good ground. have you tried pulling the park brake pedal up? the other thing to try is unplugging the wire at the proportioning valve. if unplugging the wire at the proportioning valve works check the fluid reservoir and see if 1 of them is empty. the light coming on can be signs of a hydraulic leak and the proportioning valve trying to slow it down.

 

If the ground was weak on the window/ac circuit it could back feed threw the brake warning light.

 

actually being a 92 i would start by unplugging the abs modual behind the glove box. this can trigger that light as well and usually the issue if the brakes feel the same but it random lit up.