Question about 1999 Isuzu Trooper

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Went from driving just fine parked it came out to a no start situation used jumper box fired rite up 1st time have problem can alternator go out with out any waRNING signs?

No indications what-so-ever of alternator going out drove car , parked car, 10 min. later, no start. jumper box started car rite away, could it be possible for alternator to go like that

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It is possible for a altenator to go like that , how ever it ould be the battery has failed as well. the best way to diagnose a charging or electrial issue is with the use of a simple multimeter. set the multimeter to the 20v dc scale with no engine running put the red probe to the positive of the battery and the black to the negative terminal the multimeter should read some where over 12v consider the car isn't running so the altenator at this stage is doing nothing. start the vehicle in park or neutral with hand brake on and peform the same procedure. ideal voltage with engine running would be 13.6 to 14.5 with no head lights on . this is a very simple test to establish if the altenator is in fact at the cause of the problem, if the altenator is operating in that range it is fair to say it is working fine. if the voltage is reading over and high 15v the voltage regulator has packed it in and now the battery is at risk of being cooked from over charging, there are a lot more complexed tests that can be peformed but this should get the answer of whats going on. hope you find this helpful.

Posted on Jun 30, 2014


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SOURCE: Battery is 11 months old,

This is a typical starter problem. If it were a battery you would have been able to start the car when it was jumped.

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SOURCE: I purchased an isuzu trooper model 1999, manual

No, but what I would do is buy a used computer or borrow one from somebody to see if that is the problem before you buy one from the dealer. they are expensive, used about $100. A couple of things would cause the car to stop, one, dead battery, bad alternator, but the light should have come on, the battery light would have come on too. But the car will not run without them. The injectors, I don't know that much about diesels, but, I do have 3 Isuzu's.

Posted on Apr 22, 2011

Testimonial: "thanks for the advice,yah, ill gonna borrow one computer box to see what's really wrong with my car."

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