I have a 1997 Isuzu Rodeo and the alternater is good but it is not fully charging the battery it is only charging at 50% the battery last for about a week and i have to charge it with a battery charger i have tried everything i know but i can't fix the problem i have changed the alternater and looked at the wires and everything looks good help!
Start the car,, leave the car on and disconect the battery if the car still on the alt is good but if the car turn off Replace the alt
ISUZU
1986-1995 Amigo, P'up, Rodeo, Trooper 2.3L; 2.6L
Many 1986-1995 Isuzu trucks with the 2.3L and 2.6L engine develop a low
battery charge condition caused by weak alternator output. The problem
is not necessarily a bad alternator; it is often been found to be the
result of damage to the alternator wiring harness. The harness passes
through a metal retainer near the back of the alternator, and over time,
the retainer can chafe through the harness, grounding it out. Before replacing
the alternator, inspect the harness and repair or replace it if required.
Also check all connectors and cables for signs of corrosion. High-resistance
connections can easily prevent the alternator from maintaining a full
charge in the battery.
How are we determining the alternator is charging correctly? The charge rate at the battery posts should be between 13.6 to 14.2 v If lower than 13.2v the alternater is charging too heavy and if above 14.2v the alternater is charging low. Keep in mind the higher the voltage the lower the amperage. With an amp meter hooked up between the negative post and the cable you can chk the amps being charged. a voltmeter between the positive post and its cable can show you any current draw present with everything turned off, make sure doors are close and key is out of ignition. Good Luck
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Aftermarket alts. always gave problems and we stopped using them in our shop. The ones from Isuzu would leave and never give any problem.
If alt was replaced with reman this may be your problem.You may have a bad batt and it does not matter if batt is new.have seen many new batts with cell problems.
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I have a 98 isuzu rodeo. I changed the head gaskets and put everything back and the timing is off. I aligned the timing as specified in the book and I just can't get it to start. Is there something that I am not doing or missing. I would appreciate any help I can get.
I have a 98 Isuzu Rodeo. I changed the head gaskets and now I can't get it to start. I realigned the timing belt according to the book. I just can't seem to get it started. I will take any help I can get.
i have the same problem, battery last about a week then, truck wont start in the morning, had the alternator checked out and thats ok, checked all the earth points and they seem to be ok, gonna have another look today, if i find anything i'll post on here, cheers
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