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2002 Oldsmobile Silhouette -Parasitic Draw question

Old Aug 14, 2020 | 12:56 AM
  #11  
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Originally Posted by dperonis
Once I get it back from the shop, I will keep a log of when it is driven and how far to help with further diagnosis..
If you want. I was just saying that I can't tell enough based on that description to diagnose. If you just want to clarify, that'd get me going.
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Old Aug 14, 2020 | 01:06 AM
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Originally Posted by dperonis
I don't want to dismiss this issue by saying it isn't being driven enough. I have two other vehicles that also are not driven every day. My 2008 Honda Civic sits for 3 months without being driven and still starts.
Different car, different behavior. Also a smaller engine to turn over when the time comes.

Originally Posted by dperonis
The Oldsmobile didn't have this problem before all of the recent work on it.
This is where more diagnostics are needed, as in disconnecting fuses until the current draw goes down. There could have been any number of well-cooked things moved around with the engine work that was done.

Originally Posted by dperonis
How can I find out specs for the vehicle to know what each circuit should draw and what the total draw should be when off?
I don't know of a recorded list of each item'* current draw. This would be more of a judgement thing, like pull a fuse, pull a fuse, pull a fuse, oh look, the current draw just went down a half-amp. What was connected to that last fuse that I pulled?

Originally Posted by dperonis
Also, for the solar charger, there is an option to trickle charge the battery through a cigarette lighter but only if it stays live when the ignition is off. Is this a spec that could be checked for a 2002 Oldsmobile Silhouette? How would I check that?
Shut engine off. Plug something into it, like a cell charger with an [I have power] light on it. Remove keys, close the doors, lock the car, and walk away. Come back in a half hour. Peek in window. If the cell charger still lit up? If yes then it would seem that the cigarette lighter/power-point is not powered off by unknown forces. If you want, you could wire up another (fused) power-point straight to the battery just for connecting the solar.
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Old Aug 14, 2020 | 08:32 AM
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QUOTE. This is where more diagnostics are needed, as in disconnecting fuses until the current draw goes down. There could have been any number of well-cooked things moved around with the engine work that was done.

Thanks for your responses. What does "well-cooked things moved around" mean? I am thinking it means aged wiring that could have become damaged (cracked or shorted) while being moved around during repair?

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Old Aug 16, 2020 | 10:14 PM
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Originally Posted by CathedralCub
This is where more diagnostics are needed, as in disconnecting fuses until the current draw goes down. There could have been any number of well-cooked things moved around with the engine work that was done.
Originally Posted by dperonis
Thanks for your responses. What does "well-cooked things moved around" mean? I am thinking it means aged wiring that could have become damaged (cracked or shorted) while being moved around during repair?
Yup. A given car can go for bazillions of miles (barring some other issue) with the same wires left in the same place, but move them around just once, and sometimes insulation cracks or metal (in the wire) fractures or a connector cracks and stops holding connections properly or goo/dirt/water/etc. gets in somewhere or etc.
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Old Aug 16, 2020 | 10:39 PM
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Thanks for explaining that. I don't want to miss any clues.

Is it your opinion that .082 draw is fine? I was sent a picture of the multimeter showing that reading. I really don't know for a fact if the shop pulled fuses after seeing that reading or not but I will ask.

Could a damaged wire or anything else cause an intermittent draw?

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Old Aug 16, 2020 | 11:03 PM
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Originally Posted by dperonis
Is it your opinion that .082 draw is fine?
Depends on the car, but seems a little high to me.

If it were mine, I'd try removing fuses and see what makes that number go down. This would have to be judged by what load each fuse is supporting. Like if the fuse says "cig lghtr" and nothing is connected to the cigarette lighter, and you remove that fuse . . . and that drops it by 0.7 amps, you've found a problem. If you remove the PCM fuse and it doesn't go down at all then look somewhere else. Etc.

Originally Posted by dperonis
Could a damaged wire or anything else cause an intermittent draw?
Yes, either could.
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