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Electrical issues...pulling my hair out by rwalley
Started on: 02-02-2008 03:47 PM
Replies: 4
Last post by: spark1 on 02-03-2008 09:30 PM
rwalley
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Report this Post02-02-2008 03:47 PM Click Here to See the Profile for rwalleySend a Private Message to rwalleyDirect Link to This Post
When I purchased the car, there was a drain on the battery and I finally figured out it was the contact points on the headlight motor not shutting off. Great...fixed that. So now, instead of the battery draining in 2 hours, its draining in 2 weeks....!!!! I have no aftermarket accessories and I'm about to go through the painfully long task of pulling fuses and see if that helps. Do you guys have any ideas what else could be draining power?
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86soon3.4
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Report this Post02-02-2008 03:56 PM Click Here to See the Profile for 86soon3.4Send a Private Message to 86soon3.4Direct Link to This Post
Check the rear trunk light switch. The light might be staying on.

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Xanth
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Report this Post02-02-2008 04:02 PM Click Here to See the Profile for XanthClick Here to visit Xanth's HomePageSend a Private Message to XanthDirect Link to This Post
2 weeks of sitting? Or is it dead after 2 weeks even with use?
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tjm4fun
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Report this Post02-02-2008 06:30 PM Click Here to See the Profile for tjm4funClick Here to Email tjm4funSend a Private Message to tjm4funDirect Link to This Post
disconnect the + battery. put a meter capable of at least 1 amp of current with the + of the meter to the cable, the minus to the battery. you should read no mor than 40 ma tops, normal with the ecm and a memory radio is around 15 ma.
you should remove the turnk light before hooking up the meter that way so you dont; read that draw. remove the vent to do the test with the trunk light circuit.
this should give you a baseline. for ref a radar detector will push you to almost 200ma if it is left on.
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spark1
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Report this Post02-03-2008 09:30 PM Click Here to See the Profile for spark1Send a Private Message to spark1Direct Link to This Post
May be a parasitic drain as suspected but could also be that the battery is not being fully charged.

This could be from something as simple as a loose belt or a poor battery connection. Also could be from a failing alternator or making many short trips that donít allow full recharge.

Another possibility is that the previous problem weakened the battery and it no longer has rated reserve capacity.

Or maybe something else?

edit: Here's a table showing the state of charge voltage for the various battery types. Check battery after it's "settled" for about an hour following a long run.

[This message has been edited by spark1 (edited 02-03-2008).]

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