1995 Isuzu Trooper Electical Problem

Tiny
PS2CHIPER
  • MEMBER
  • 1995 ISUZU
I have a 1995 Trooper 3.2 sohc 4x4 automatic. And when im driving out of no were the voltage will jump to 16 volts as high as it can go. The check transmission light will come on and the airbag light will come on. I can hear the belt slip in the engine compartment. And the ac will blow harder. When the check transmission light comes on it will stay stuck in what gear the problem happend in. Also I dont what tool to use to check the computer as I dont belive it is obd 2. Should I start with the alternator and voltage regulator.
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Monday, November 20th, 2006 AT 7:39 AM

4 Replies

Tiny
DOCTORADAM
  • MEMBER
Hey, I'm new to this site and I just spent the last ten minutes writing a reply which I don't think went thru-so if this is a repeat I'm sorry. I have the same make and model with the same electrical problem--that's why I'm here. The same thing happened one year ago-minus my noticing the overcharging-with the trans slipping and the engine running rough and stalling. I noticed the spark plug wires were showing wear at the areas they were rubbing together. I purchased a new set of autolite professional wires from the local auto chain ($98.00) and that seemed to fix the problem. Exactly one year later, I pull out from a light, and the trans starts slipping, the trans light starts flashing along with the air bag light, the alt starts overcharging, and it won't pull and the engine won't idle. I get to looking at the wires and notice the same wear patterns and in the dark I can watch the spark travel down the wire--I don't think you are supposed to be able to do that. Thank goodness I got the lifetime warranty, so I replaced the wires and it runs much better now. The alt only overcharges at quick/high rpm. I think the electrical surge was screwing up the computer, and everything on my model is controlled by that dang computer. I'm still wondering if I have an alternator going bad or if the engine is still missing (bad spark plugs--hard for me to tell with the computer adjusting the engine). And I don't understand what is causing the spark plug wire breakdown. So check those spark plug wires (with the engine off--trust me) and see if they are worn. If this helps or you find out anything else please let me know.
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Tuesday, December 12th, 2006 AT 4:37 PM
Tiny
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Thanks for your reply. I just bought a new alternator over ebay and wiating for it to arrive. I read in a manual and asked the isuzu parts guy and they said its the alternator. I will give the plug wires a look.
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Friday, December 15th, 2006 AT 7:52 AM
Tiny
DOCTORADAM
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I was just wondering if the alternator fixed the problem. I went four days of hard driving and put about 500 miles on my trooper with no problems and then it started again but very sporadic. I hoped that fixed your problem, but I still need help. Please let me know.
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Saturday, December 23rd, 2006 AT 5:46 PM
Tiny
PS2CHIPER
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Yup the alternator fixed it. Call your dealer with your vin to get the part number. And go on ebay and buy a replacement. Thats what I did. And had a local mechanic install it. It was 150 total. Not bad becuase autozone wanted 190 plus tax and they had to order it too.
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Saturday, January 6th, 2007 AT 4:16 AM

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