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05-29-2007 05:36 AM #1
OBC lights dim, cd player shuts off when brakes
Hello, (formerly DEADM5 here, Well, just past break in period. It seemed forever to get 1,250K on my rebuilt engine. Happy and drunk on the power of a fresh engine. My OBC lights dim and CD player cuts out intermitently. I read some post from about 4 years ago, Philo found a ground strap dangling behind the head. I found the same ground wire tonight and grounded back to the hex nut on the valve cover. Is that where this ground goes? SO much for my master mechanic. Well, now the stereo unit shuts off everytime I press the brake pedal! The unit is hooked up directly to the battery and grounded well at the firewall. I did not use factory wires. Does anyone know what this ground strap is for? I will be checking alternator function in the morning. Any other suggestions?
05-29-2007 10:11 AM #2
05-29-2007 10:44 AM #3
Re: OBC lights dim, cd player shuts off when brakes
I don't have the answer to your problem but I'm interested in a resolution. I too have this issue with a new radio, but I'm using the stock wiring setup. The interuption happens more when it is raining or wet outside and I was thinking of having a new player re-wired directly (run new power & grounds to the battery) so now hearing that may give WORSE results is troubling.
[my OBC and most behind the dash lighting has never worked so I have no comment about it dimming]
05-29-2007 03:02 PM #4
05-29-2007 10:27 PM #5
Re: Thanks for advice
My radio is connected directly to battery w/ it's own fuse link. So ex that possibility. Problems doesn't seem that bad when engine is running since I hooked up the loose strap. I'm thinking this is a voltage regulator/alternator issue. I think the part is a least 6 years old.
05-31-2007 12:59 AM #6
- Long Beach, CA, United StatesMember No: 45949
- Join Date
- Aug 2002
- Rep Power
Re: OBC lights dim, cd player shuts off when brake
MZ5.. at the time of that ground strap post 4 years ago I was trying to solve a intermittent problem with my tach shutting down, the brake idiot light in the overhead coming on, and the radio shutting down. When I discovered that ground strat, which I think I learned from Bruce in Canada or Ethan Turner, I thought I solved the problem.... WRONG.
It was fuse #6 bouncing around in the distribution box. Just bend the metal holder ends and make sure the fuses are nice and tight, maybe this will solve your radio cut out problem. The dimming is a hard one to chase. My car does the same although with my new head unit I no longer have this problem and I'm using stock wires. Weird I know...
If you have clean power and a good ground for the radio this shouldn't happen. Try resetting the ground to a stock ground post location. There's one under the steering column.
Good luck !
06-01-2007 06:49 AM #7
06-02-2007 03:01 PM #8
Re: Thanks for advice
This happened to me when the connection from the alternator to the fuse box was lose (I don't remember which fuse it was) after a fuse box replacement. After having radio/obc stuff flicker intermediately, the car finally died on the road when the battery ran out of juice. The mechanic quickly went to the fuse box and fixed it within 10 minutes when I took it back into the same shop.
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