1999 Mitsubishi Montero gone through 2 alternators and 3 ba

SMILESHAM · Posted at Fri Aug 29, 2008 12:17 pm

Electrical problem
1999 Mitsubishi Montero 6 cyl Four Wheel Drive Automatic 95000 miles
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What is going on with Mitsubishi's electrical system! I have checked several message boards that express the same problem I am having. I have a 1999 Montero and have had to replace the alternator twice and the battery 3 times. I have read all sort of things that I should do. Unfortunately I am not finding the same advice for this problem. I am hoping that you have heard of these burnt out alternator and battery occurrences. Please tell me what to do.

Thanks you in advance for your help.

Service Writer · Posted at Sat Aug 30, 2008 2:53 am

Is it under charging or overcharging?

I have heard of PCM problems with this situation. Also the brand of alternater can be significant. I would suggest USA, Napa premium orWorld wide on this one.

SMILESHAM · Posted at Mon Sep 01, 2008 3:32 am

How do I know if it is under charging or overcharging?

Also what is PCM?

Service Writer wrote:

Is it under charging or overcharging?

I have heard of PCM problems with this situation. Also the brand of alternater can be significant. I would suggest USA, Napa premium orWorld wide on this one.

Service Writer · Posted at Mon Sep 01, 2008 4:10 am

What brand alternater are you using?

Testing an alternater:

http://www.2carpros.com/how_to/how_to_test_alternator.htm

Some parts stores will do this as well.

SMILESHAM · Posted at Mon Sep 01, 2008 4:42 am

It's a Master Quality Premium Remanufactured Alternator

Service Writer wrote:

What brand alternater are you using?

Testing an alternater:

http://www.2carpros.com/how_to/how_to_test_alternator.htm

Some parts stores will do this as well.

Service Writer · Posted at Mon Sep 01, 2008 8:48 am

IF it's out of spec, take it back and see if you can get one of these: USA, Napa premium orWorld wide .

SMILESHAM · Posted at Mon Sep 01, 2008 9:07 am

The technician says there is a oil leaking into the alternator.

Service Writer wrote:

IF it's out of spec, take it back and see if you can get one of these: USA, Napa premium orWorld wide .

Service Writer · Posted at Mon Sep 01, 2008 3:01 pm

Well that would certaiinly cause a problem.

SMILESHAM · Posted at Mon Sep 01, 2008 11:09 pm

FYI there seems to be an ongoing investigation into the mysterious oil leaks that keep causing alternator failures in Mitsubishi's Monteros. Based on my online research, anyone having this problem should have their mechanic check: camshaft, crankshaft front seals, all connections
are clean and in good condition, earth connections, alternator belt is it too loose, too tight or cracked, air conditioner belt, fuse box located near battery, slipping drive belt (it turns the alternator), and diode.

Also, if your alternator is 10 years old or older it probably just needs replacing.

Service Writer wrote:

Well that would certaiinly cause a problem.