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| AvalonFal |
Aug 19 2014, 03:21 PM
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Member ![]() ![]() Group: Members Posts: 486 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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| mikesmith |
Aug 22 2014, 11:57 PM
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#2
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Member ![]() ![]() Group: Members Posts: 202 Joined: 5-September 13 From: SF Member No.: 16,354 Region Association: Northern California |
The wire going to the ignition switch is (almost) completely disconnected when the switch is off (power tap goes to light switch for parking lights).
Lots of stuff (including your stereo) will be getting power from the other wire. Unswitched power is present on the hot side of fuses 10, 11, 12. A good start would be to pull each in turn to see what happens to your draw. 12 normally goes to headlight up/down relays. 10 is normally fog lights. 11 goes all over the place. There is a spare battery power tap on the back of the 10/11/12 fuses that is a likely place for someone tidy wanting 'backup' power for an after-market stereo. I'd look there too. |
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
914Mels If your looking for a battery draw, you need to be... Aug 20 2014, 02:24 PM
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
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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