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1993 GMC Jimmy Repair Question


Topics covered: Battery, Alternator, Fuse.
Mileage: 130,000 miles.

Asked on February 6, 2011

Battery

I have a 93 gmc jimmy im having problem with the battery staying charged put new battery in and a new allornator in
Avatar Asked by whitewolf 03

Answer

Replied on February 6, 2011

Is it dieing while it's being used or after it has been parked for a while.

Tiny Answered by Wrenchtech (expert)
14,742 answers provided
Replied on February 6, 2011

while it is running and then it will not start with out a jump

Tiny Response from whitewolf 03
1 question asked
Replied on February 6, 2011

I'd use a digital multimeter across the battery posts, everything off, note the reading. Start the vehicle take second reading across battery posts, the second reading should be higher than the first, if alternator is charging. If alternator isn't charging, the first thing I check is voltage at the L terminal for alternator.

Another possibility is a battery drain, with everything turned off. The first to check is for any lites left on, interior, under the hood, anywhere. Best time to check is in the dark. If that checks ok and the drain is on a fused circuit, take battery cable loose, use a testlite between cable and battery post, if the lite comes on bright, you have a drain. You pull/replace fuses one at a time. When you pull fuse on a faulty circuit, the lite goes out. Then you have to see what all is on that circuit. Go from there.

Tiny Answered by JDL (expert)
14,406 answers provided

Replied on February 6, 2011

I don't suspect you have any kind of parasitic drain since your problems are occurring while the engine is running. There has to be some type of issue with the charging system.

Tiny Answered by Wrenchtech (expert)
14,742 answers provided
Replied on February 6, 2011

Have the battery and alternator load tested if both okay start tracking wires

Tiny Answered by rasmataz
68 questions asked
Replied on February 6, 2011

thank you i'll check them

Tiny Response from whitewolf 03
1 question asked