Pressing brake causes headunit to reset/short.

[shEck3lls0]

When I press on my brake sometimes, my head unit turns off and then comes right back on. It doesn't stay off as I continue to depress the brake. Also, it doesn't always happen, but occurs pretty often. Anyone know why this would happen? A short or anything? Not sure why the brake would effect the headunit. I recently did a rebuild, so there is a possibility that my wiring could of been messed up somewhere. Just wondering if any of you could give any help since im less of an electrically inclined person. Also, when my headunit is playing, sometimes it gets a little bit staticy, like there isnt enough power. If i rev my engine to about 5k(an exact rpm everytime), it kicks back in and is fine. This doesn't occur quite as often as the brake problem.

[shEck3lls0]

Anyone? This problem is really bugging me.

[rkettner]

perhaps the power wire runs somewhere near the brake pedal arm and gets disconnected.

[bmwguy325is]

I think there are ground wires the run near the pedal box. I think some even attach to them. Check the grounds they are like 10mm bolts.

[Morrison]

That makes me think that maybe someone tried grounding the radio to the wire on side of the brake switch that receives +12V when pressing the brake. That would mean though that your radio is grounded "through" the brake lights and would reduce the radios power capabilities. I can't really think of any other way that pressing the brake pedal would affect things.

Just double check where your power and ground for the radio lead to and if in doubt, supply it with "new" wires for each and connect them to ideal locations.