 Battery Connection Help |
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| AvalonFal |
  Aug 19 2014, 03:21 PM
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#1
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Member  Group: Members Posts: 485 Joined: 3-July 05 From: Southern New Jersey Coast Member No.: 4,367 Region Association: MidAtlantic Region  |
I've been having problems with the battery draining over a couple of days of non-use, so I'm intending to replace the PO's battery cables (a few splices in the current ones) and go from there. PO relocated battery to the rear trunk & that's OK. However, I came across this situation:
- Engine off, key out. - (+) battery cable disconnected at battery - (-) battery cable still connected I measured across the disconnected (+) cable to the connected (-) cable & got a voltage of around .6 - .75 volts. Is this normal to have voltage across a disconnected (+) cable?? Car starts fine when battery is charged, but, as I said, battery loses juice after being idle for a couple of days. |
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Replies
| 914Mels |
Aug 20 2014, 02:24 PM
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#2
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Member Group: Members Posts: 357 Joined: 20-June 11 From: Santee Member No.: 13,221 Region Association: Southern California |
If your looking for a battery draw, you need to be looking at amps, not voltage. Hook up a amp gauge between the positive cable and the positive post and see what draw you have. Anything more than 40-50 milliamps is going to drain your battery. You don't need to buy a real expensive meter for this kind of testing, a ten dollar meter will work.
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Posts in this topic
AvalonFal Battery Connection Help Aug 19 2014, 03:21 PM
stugray Is there an aftermarket stereo in the car?
Or is ... Aug 19 2014, 06:10 PM AvalonFal Yes, there is an aftermarket stereo in car. Meter ... Aug 20 2014, 06:32 AM stugray You are probably seeing residual voltage for the c... Aug 20 2014, 07:27 AM Rand I would pull fuses and see when the parasite stops... Aug 20 2014, 06:58 PM AvalonFal After pulling fuses, relays, pins, cables and cutt... Aug 22 2014, 02:21 PM 914Mels jump one of the wires and see if you regain your f... Aug 22 2014, 02:41 PM stugray Put the meter in current mode (this usually requir... Aug 22 2014, 04:02 PM mikesmith The wire going to the ignition switch is (almost) ... Aug 22 2014, 11:57 PM ClayPerrine Here is another way to measure amp draw on a car e... Aug 23 2014, 07:04 AM Tom There is a very much easier way to make a shunt.
... Aug 23 2014, 12:39 PM AvalonFal Thanks everyone for the electrical info.
Getting ... Aug 23 2014, 03:12 PM
stugray SO the draw is downstream of the the connection at... Aug 23 2014, 04:39 PM |
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