Battery Drain
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From: Cape Coral, Florida
OK, so you're saying you checked for voltage drop across ALL of the fuses and they all read 0.00 which they should ??...I'm assuming you have the passenger door open and "locked" like in the video to check those fuses in the IP fusebox ??...show us a picture of how you have the DVOM connected to the car...ARE YOUR 2 LEADS AND FUSES GOOD ??...DVOM fuses are usually limited to 10 amps...you have to trust your equipment so after the modules go to sleep you should see about 0.025 amps...25 milliamps is a good number...nothing written in the FSM but max current draw is usually the RC of the battery divided by 4. You also should be doing this draw test with a fully charged battery...12.66...if you want to drive to Florida I'll look at it for you !!!
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Le Mans Master
Joined: Jul 2010
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Thread Starter
Le Mans Master
Joined: Jul 2010
Posts: 5,923
Likes: 705
OK, so you're saying you checked for voltage drop across ALL of the fuses and they all read 0.00 which they should ??...I'm assuming you have the passenger door open and "locked" like in the video to check those fuses in the IP fusebox ??...show us a picture of how you have the DVOM connected to the car...ARE YOUR 2 LEADS AND FUSES GOOD ??...DVOM fuses are usually limited to 10 amps...you have to trust your equipment so after the modules go to sleep you should see about 0.025 amps...25 milliamps is a good number...nothing written in the FSM but max current draw is usually the RC of the battery divided by 4. You also should be doing this draw test with a fully charged battery...12.66...if you want to drive to Florida I'll look at it for you !!!
Chicago. Yes to everything. After car sat for a week the battery is still 12.6. I hook the batt back on and the car starts right up with fast cranking. Again i checked meter with putting it in line with a battery charger and read 4amps charger, its a 1amp charge Its for electric bike battery. black ground to meter wire. red wire to battery negative.
This is not how i hooked up the wires. This is just to show meter works.
And by the way there is a safty switch internal that shuts off after 2 seconds of over draw then kick back on and that's continuous.
I don't know why this popped up in my head but it's like choking or friend to death bring im back and do that over and over.
Last edited by helga203; Jan 20, 2022 at 11:24 AM.
Melting Slicks
Joined: Mar 2018
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From: California
I think someone hooked the radio up wrong . Did you disconnect the amp wires for the Bose speaker’s .
And since you hear a clicking I might also suspiciously suspect maybe a faulty connection or something is going on with a headlight actuator…maybe the main motor connection on the passenger side hook up … cigarette lighter un hooked in back of the bezel hitting some metal causing a draw ?
And since you hear a clicking I might also suspiciously suspect maybe a faulty connection or something is going on with a headlight actuator…maybe the main motor connection on the passenger side hook up … cigarette lighter un hooked in back of the bezel hitting some metal causing a draw ?
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Le Mans Master
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I think someone hooked the radio up wrong . Did you disconnect the amp wires for the Bose speaker’s .
And since you hear a clicking I might also suspiciously suspect maybe a faulty connection or something is going on with a headlight actuator…maybe the main motor connection on the passenger side hook up … cigarette lighter un hooked in back of the bezel hitting some metal causing a draw ?
And since you hear a clicking I might also suspiciously suspect maybe a faulty connection or something is going on with a headlight actuator…maybe the main motor connection on the passenger side hook up … cigarette lighter un hooked in back of the bezel hitting some metal causing a draw ?
There is no stock radio, speakers or amps im using. I have all aftermarket. I disconnected my whole system no power whats so ever. But when i pulled the bose amp fuse went down .100map. dont no why because i wasn't using it but the fuse is out know so my draw is .150ish in sleep mode. When car is on but not running 3.50amp.
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Le Mans Master
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If u dont hear back from me im in a ditch somewhere looking for my garage.
Burning Brakes
Joined: May 2003
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From: LI NY
Whats speedy, been awhile,
There is no stock radio, speakers or amps im using. I have all aftermarket. I disconnected my whole system no power whats so ever. But when i pulled the bose amp fuse went down .100map. dont no why because i wasn't using it but the fuse is out know so my draw is .150ish in sleep mode. When car is on but not running 3.50amp.
There is no stock radio, speakers or amps im using. I have all aftermarket. I disconnected my whole system no power whats so ever. But when i pulled the bose amp fuse went down .100map. dont no why because i wasn't using it but the fuse is out know so my draw is .150ish in sleep mode. When car is on but not running 3.50amp.
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Melting Slicks
Joined: Mar 2018
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From: California
And we might be doing all this diagnostic for nothing …I do know the auto theft / alarm is activated when doors get locked … a possibility here is that over time when sitting for a few months the constant draw for the alarm is just draining and causing your battery to have weak cells …maybe a new battery solves it for 2 years because of the constant draw when idle in the winter annually.
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Le Mans Master
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Are you sure the car went into sleep mode? You have retained accessory power to the radio for up to 15 minutes after the key is off. I haven't done this test myself on the C5 but you probably need to wait the full 15 minutes, with the meter still connected in series, until it goes into sleep mode. At a minimum you need to wait for the under hood light to go out.
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Le Mans Master
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And we might be doing all this diagnostic for nothing …I do know the auto theft / alarm is activated when doors get locked … a possibility here is that over time when sitting for a few months the constant draw for the alarm is just draining and causing your battery to have weak cells …maybe a new battery solves it for 2 years because of the constant draw when idle in the winter annually.
If i hook bat back on within 2 days its dead.
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Le Mans Master
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Disconnect all aftermarket accessories. No change If i drive it every day no problems starting but a little slower crank.
Race Director
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Melting Slicks
Joined: Mar 2018
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From: California
Anti theft / alarm using more then expected … ? I know you have most of it unhooked but possible maybe when u did the stereo wiring did you run some wires together that maybe shouldn’t be tied ? Is the fuel pump constantly drawing power ? Just trying to help narrow your search interior light work and shut off as intended? Honestly it really does seem like a stereo wiring issue, but if it’s like ya say it’s disconnected have u pulled the stereo and taped off the ends and gave it a go or just removed the fuse ? Got me stumped
Burning Brakes
Joined: May 2003
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From: LI NY
210-250mA draw is too high. Maybe start pulling fuses one at a time and watch your current meter. If the Bose draws 100mA after its asleep thats a problem. Don't forget the fuses down on the passenger floor. My first suspect would be an aftermarket stereo or amp next would be an alarm then the power seats. I had a '98 back in the day and I couldn't go two weeks without putting it on a maintainer and I think it was because of the proximity sensor for the fob on the early cars and it also had a lojack that probably drew some power. Good luck
Thread Starter
Le Mans Master
Joined: Jul 2010
Posts: 5,923
Likes: 705
Anti theft / alarm using more then expected … ? I know you have most of it unhooked but possible maybe when u did the stereo wiring did you run some wires together that maybe shouldn’t be tied ? Is the fuel pump constantly drawing power ? Just trying to help narrow your search interior light work and shut off as intended? Honestly it really does seem like a stereo wiring issue, but if it’s like ya say it’s disconnected have u pulled the stereo and taped off the ends and gave it a go or just removed the fuse ? Got me stumped
Thread Starter
Le Mans Master
Joined: Jul 2010
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210-250mA draw is too high. Maybe start pulling fuses one at a time and watch your current meter. If the Bose draws 100mA after its asleep thats a problem. Don't forget the fuses down on the passenger floor. My first suspect would be an aftermarket stereo or amp next would be an alarm then the power seats. I had a '98 back in the day and I couldn't go two weeks without putting it on a maintainer and I think it was because of the proximity sensor for the fob on the early cars and it also had a lojack that probably drew some power. Good luck
Thread Starter
Le Mans Master
Joined: Jul 2010
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FWIW.....Helga, I had this problem once, years ago. I hope your problem isn't the same as I had. Mine turned out to be a bad BCM. Not cheap to fix, and even more to replace new (when they were still available new!). I spent close to $900.00 back in 2014 for the last new C5 BCM they had in the AC/Delco warehouse near Detroit, Mi.. Been good ever since. I know it used to be around $400.00-$500.00 to repair, but IDK what it'd cost today. Best of luck, my friend.....
Race Director
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Good question!!! I don't remember how, because it was 16 years ago, and my car went off the road for the next 8 years. Answer lost to history (and an aging memory chip!!). Sorry. But I'm sure someone will chime in that knows how...
). Sorry. But I'm sure someone will chime in that knows how...
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From: Cape Coral, Florida