Question about 1991 Toyota MR2
Can usually jump start, but eventually happens again.
If you don't already own one and are in any country that imports Chinese stuff, buy a cheap digital multimeter, specs are not important but make sure it has a 10 amp range (normally extra input for this).
They can be had for under $20 US at any auto parts (chain) store or if in the US and find 'Harbor Freight' in your telephone book, they have these for under $10 all the time; I've bought several for $3.00 each for our various vehicles.
You need to have everything turned off (that you know of). Remove one fuse at a time, replacing each after checking, set the meter on the 10 amp range and measure directly across the open fuse contacts. I would advise pluggin in one lead and only tapping the second contact briefly to see if the current drain exceeds 10 amps; this range is NOT fused and several seconds exposure to 15 amps or more will fry the guts of the meter.
If you find nothing drawing more than tenths of an amp, then you will have to check any aftermarket (non-factory) items separately since often power amplifiers or convertors will use their own fuse or even an inline fuse.
This may take some time to find the 'leak' but not as much as having someone jump-start you all the time.
BTW, alternators can have a single defective diode in them that will draw current with the engine off and this can amount to an amp or two, enough to gradually discharge even a healthy battery. Most batteries have ratings of 60 AH or less and a 2 amp drain that doesn't bother them for a few hours can become a killer over a couple of days since that two amps is ~ each hour so 48 hours equal one really dead battery.
Posted on Nov 16, 2008
The alt can check good and still be bad....ive had it happen several times have it rechecked and or get a new one
Posted on Nov 16, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 10, 2013 | 1996 Jeep Grand Cherokee
Aug 08, 2010 | 1987 GMC VanDura
Apr 11, 2010 | 2001 Toyota Camry
Nov 15, 2009 | 1991 Ford Tempo 4 Door
Aug 28, 2009 | 1986 Nissan Pickup 4WD 1986
Aug 28, 2009 | 1995 Toyota Camry
Aug 04, 2009 | 1996 BMW 318
Feb 26, 2009 | 1995 Lincoln Town Car
Dec 09, 2008 | 1992 Lexus Ls 400
Sep 02, 2015 | 1991 Toyota MR2
118 people viewed this question
Usually answered in minutes!