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My 1991 MR2 was running fine, and apparently charging fine.

Customer Question
The battery got a bit...
My 1991 MR2 was running fine, and apparently charging fine. The battery got a bit low so I replaced it and it ran for several days/weeks thereafter. This weekend everything is dead; no power to nothing. It's so abrupt I expect that a short or blown fuse, likely the latter, is to blame. Before I call AAA (there's no Toyota dealer nearby) and TRY to jump start the car, is this a common problem?
JA: Battery issues can be tough to diagnose - lots of things to consider. Luckily, the mechanic I'm going to connect you with knows all the tricks and shortcuts. Are you hoping to fix this yourself?
Customer: Sure, I kind of have to as the car is so old no one has manuals or experience with them at the dealerships (so your expertise would be greatly appreciated).
JA: Great! What have you tried so far?
Customer: I looked at the battery and it appears uncorroded with tight connections (but what do I know?).
JA: Is there anything else the Toyota Mechanic should be aware of about your Toyota?
Customer: no
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Toyota Mechanic about your situation and then connect you two.
Submitted: 1 year ago.Category: Toyota
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Answered in 3 hours by:
5/2/2016
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 1 year ago
Ted Ritter
Ted Ritter, Toyota Master Tech
Category: Toyota
Satisfied Customers: 4,521
Experience: Toyota Master Tech, ASE Certified
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Hello, thanks for posting I just saw your post, do you still need help with this? Did jump starting hel and did it keep running?Do you have a voltmeter handy?
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Customer reply replied 1 year ago
AAA checked the battery and said it was "zero" (really dead). Since the battery is pretty new (1 month old) and the battery gauge is reading high (in the direction of 18v) maybe the alternator isn't charging the battery? I thought the gauge showed the battery charge though so I'm confused. The cables are fastened tight and appear clean. Thoughts?
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 1 year ago
If it's driveable can you have the charging system tested just to be sure? Most parts stores like autozone do this for free. There's no doubt something is discharging this battery, have you checked all the lights including the brake lights to make sure they don't stay on? Does it have any aftermarket stuff installed like audio amps or sound system, anything like that? Is there an aftermarket alarm system installed, all of these can cause an excessive battery draw. We can check battery current draw but you need a digital volt/amp meter, can you get one or do you happen to have one?
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Customer reply replied 1 year ago
I'll try to get it to somewhere tomorrow that can check the charging system. Thank you for your help.
Toyota Mechanic: Ted Ritter, Toyota Master Tech replied 1 year ago
You're welcome, let me know how that goes, maybe they can also check for an excessive current draw on the battery while the engine is shut off and everything is turned off like it would be parked overnight.
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