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> Need Help/different Perspective On Battery Drain
atmulvi
post Jan 11 2014, 02:50 PM
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I've had some sort of electrical short/drain/issue on my 94 volvo 850.
I had the battery and alternator tested; both working fine.
I tested every fuse with a multimeter between the negative lead and negative battery terminal and it read an 0.18 Amp draw, but dropped to 0.12 amp when I removed the fuse for the central locking mechanism.

So I think, "yes, I've located the problem." Nope.
There are still 0.12 amps being drawn that are unaccounted for.
Any advice or perspective on what might be drawing the power if it isn't a parasitic battery drain?

This post has been edited by atmulvi: Jan 11 2014, 02:50 PM
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grendel1960
post Jan 11 2014, 04:19 PM
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alarm system?
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Kiss4aFrog
post Jan 20 2014, 09:50 PM
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Try to take the lead off the alternator or disconnect the alternator at the starter to see if it's the alternator that is back feeding the circuit. An alternator can be charging properly and pass a test and still be bad and allow current to flow "BACKWARDS" discharging the battery when not running. It's from one of the diodes in the regulator shorting out.

Do you have an aftermarket radio and or an extra amp ??
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Dallensc
post Feb 23 2020, 04:06 PM
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QUOTE (Kiss4aFrog @ Jan 20 2014, 09:50 PM)
Try to take the lead off the alternator or disconnect the alternator at the starter to see if it's the alternator that is back feeding the circuit. An alternator can be charging properly and pass a test and still be bad and allow current to flow "BACKWARDS" discharging the battery when not running. It's from one of the diodes in the regulator shorting out.

Do you have an aftermarket radio and or an extra amp ??


I changed the regulator in my alternator and also bought a new battery, however my battery light still turns on and after driving for a while it goes out. Then the next morning the battery light is back on. What should be my next step?
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