1996 Isuzu Trooper Charging System issue

DesertratDesertrat Member Posts: 1
edited October 2019 in Isuzu
I have 1996 Isuzu Trooper. When driving from a dead stop the dash voltmeter needle drops into the 8-9 volts area. When parked overnight with a new battery it was totally drained by morning. Would a bad voltage regulator or bad charge relay cause this?


  • PF_FlyerPF_Flyer Member Posts: 9,372
    I guess those are possibilities. There's obviously a drain/short somewhere along the line. Given the age of the vehicle, it could even be as simple as frayed wiring. Since a new battery is totally drained overnight, I'm thinking it HAS to be shorted to ground, or something is drawing power.

    Example, I had a battery suddenly drain one time that was caused by a worn ignition cylinder. I didn't realize it, but I was able to remove the key from the ignition without turning it all the way to the Off position. It was actually in Accessory, and the blower fan being on sucked up the juice.

    Point is that you probably should check all paths that lead to the battery and eliminate possibilities one by one
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