Can a short circuit in a car’s wiring cause a dead battery in the morning?
Mooch asked:
Recently, the fuse for our power door locks in our car has been blowing out on a regular basis. We finally stopped worrying about it and just started operating the locks manually and leaving the fuse pulled out.
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on Monday, June 29th, 2009 at 11:51 pm and is filed under Maintenance & Repairs.
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Recently, the fuse for our power door locks in our car has been blowing out on a regular basis. We finally stopped worrying about it and just started operating the locks manually and leaving the fuse pulled out.
Can this cause a drain on our car’s battery if the fuse is pulled out? I mean, isn’t the fuse there to make sure no current is going the wrong direction? Pardon my ignorance on this one, but I know nothing about automotive wiring.
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July 2nd, 2009 at 3:27 am
It’s time you went to a repair shop that specializes in vehicle electrical. Make sure they can perform a “parasitic battery draw” test on your battery to find what’s drawing excessive current from your battery. The normal parasitic draw should be less than 1/4 ampere when the car is parked overnight. However, if your battery is over 5 years old, I’d definitely replace it because it’s probably not holding a charge too well and may be draining down more than it should when the car’s parked. If you live where a cold winter might be coming, now’s a good time to replace an old battery.
July 2nd, 2009 at 1:03 pm
you may have wires from another circuit crossed with the ones for the power door locks you may want to do a current drain test with the key off. it should be less than a half an amp if it is more you can pull other fuses to see if it drops to pin point the other circuit with the short
July 5th, 2009 at 7:31 pm
You bet your sweet bippy
July 6th, 2009 at 11:58 am
The thing is, you have not fixed the issue on the 1st place and was… Why the power lock fuse keep burning up? That tells you there is a short somewhere. Also it could be too much load on it but I think that is not the case here. You had to find out why it was doing it and there you have it. Is possible the system got grounded somehow and that is causing to blow the fuse and eventually draining the battery.
July 8th, 2009 at 10:53 am
if the fuse has been completely removed No it shouldn’t drain the battery. However you should get the problem checked out.
July 11th, 2009 at 3:13 am
If the fuse is out of that circuit it shouldn’t drain your battery, there is probably another circuit doing it.