First of all I want to thank you all again for helping me out with installation of an Alpine HU in a 1991 BMW325i awhile back. We recently went on vacation and the car wasn't started for about 5 days. Upon return the battery was low/dead. Had to jump the car. My gf took it to a shop who checked battery and alternator and said all was ok there. She then paid the $95 to put an amp meter on the battery and pull a couple fuses until the drain went away. They claim the fuse supplying the stereo was the circuit and that it was pulling 170 ma. My question is, how much current draw should I expect from the HU when the key is off? The stereo turns off and the antenna goes down so I assume the only thing using current is the other wire for the channel memory etc. 170ma seems high to me. Nothing else in the car remains on except two small dash lights for 'oil service life' and they are leds which I wouldn't expect to pull much current.
No amps are installed, just the HU and speakers.
Thanks, Eddie
Replies (2)
cplkittle on 07/15/2004 15:34:03
The HU should not pull much at all. not enough to drain the battery, even if the vehicle wasn't started for a year. a 9v battery could possibly hold the memory for months. It sounds like there is something else feeding off of this circuit.. I would suggest a cheap volt/ohm meter so that you could test it yourself. Unplug the radio and then test that circuit again to further isolate the culprit.
ttocs on 07/16/2004 17:45:59
that is high. I had a similar problem in a customers car. I eventually found that the CD changer would continue to cycle With the key off. This was stopped when the face was removed, but there was something wrong. It was in a ferrari 355 spyder that they drove only occasionally, so the battery was dead everytime they got in it....
No amps are installed, just the HU and speakers.
Thanks, Eddie
Replies (2)
cplkittle on 07/15/2004 15:34:03
The HU should not pull much at all. not enough to drain the battery, even if the vehicle wasn't started for a year. a 9v battery could possibly hold the memory for months. It sounds like there is something else feeding off of this circuit.. I would suggest a cheap volt/ohm meter so that you could test it yourself. Unplug the radio and then test that circuit again to further isolate the culprit.
ttocs on 07/16/2004 17:45:59
that is high. I had a similar problem in a customers car. I eventually found that the CD changer would continue to cycle With the key off. This was stopped when the face was removed, but there was something wrong. It was in a ferrari 355 spyder that they drove only occasionally, so the battery was dead everytime they got in it....
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