Having problems with your 1997 Pontiac Bonneville ?

1997 Pontiac Bonneville runs fine for hours, but then charge dies

\015 Ok. Just bought a 1997 Bonneville with 200k miles 2 weeks ago. It has a wierd problem. If I run the car for about an hour, then the battery charge indicator will start to fluxuate at what seems to be 2-5 minute intervals. If i run any electrical component(A/C, radio,lights, power windows, etc...) you can watch the indicator go down, all the way to 0 and it will stall the car out.\015\012\015\012I have replaced the ignition coils, plugs, plug wires, alternator, and battery.\015\012\015\012The obd read 18070(Transmission Component Slip), but I somehow dont think thats what is causing me to lose charge. Can anyone help? Thanks.\015 Posted / edited by AnonymousUser on : 15-08-2022

Answers :

It sounds like your alternator belt is loose. It will expand as it gets warm from running the engine. That will allow the battery to drain. Tighten or replace the belt.
Make sure the battery is good and fully charged . You will get the code if the battery is bad on the transmission.Check the ground wire from the engine to the frame of car. Must have a good one. Check to see if the battery cable is getting hot. The gauge inside the car could also be bad. A few things you should look at
Repair Help & Product Troubleshooting for 1997 Pontiac Bonneville

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