Purchased this vehicle over this past weekend man tells us that it has weak battery shows dated 2005 ok. 1999 Isuzu Truck Rodeo 4WD 3.2L MFI DOHC 6cyl; we try to drive home and wow stops running. Check battery 11.4volts. ok in a pickle, head to closet auto zone and change batteries. New battery. wow car runs for an hour. same problem. Not the battery. Charged the battery and then replaced the alternator. I assumed my problem was solved. An hour later I'm in a fix again. Next solution; buddy tells me is that it is the computer, so here I charge battery and get a replacement computer. I give up. same problem.. car does not stay running. Now I need to reach out for help.
Car runs good until battery runs out on 1999 Isuzu Rodeo
2 answers 1 comment
Did you check to see if the alternator is charging the battery. Computer has nothing to do with the charging system.
There needs to be a "heavy wire" connection between alternator and battery positive terminal. Try taking wire off back of alternator, and use a test light from wire to a good ground. If light does not come on you have a bad wire or connection. Some wires have a "fusible wire" in the circuit, and that could be bad. If you have a DC volt meter check voltage at battery and should read I the mid 13 to low 14 volt range if battery is getting charged.
Have you gotten a check engine light or any warning lights? Have you had codes checked if any?