2002 Buick Rendezvous Battery Has No Power and Won’t Start

I have a 2002 Buick Rendezvous. Yesterday it wouldn’t start, no power to anything. Charged the battery and it started and ran. This morning it started once but the second time same problem. Tried charging the battery and no luck. Checked battery it is good. I’ve been checking fuses and such, a couple times the overhead light will come on when I open the door, then it goes back off. No power to anything at all.

How do you know the battery is good? How was it tested?

I took it to Autozone and had it tested. They suggested ignition switch issues.

Can you tell me the results of the test? Cold Cranking Amps? Voltage?

Voltage 12.54, measured 673 cca – rated 700 CCA.

OK good that is some decent results. It could very well be an ignition switch issue. A good way to test is to put the key in the ignition and tap on it or wiggle it back and forth to see if you can make connection.

And if it will connect?

Then you know for sure you have an ignition switch problem and it should be replaced.

It won’t connect at all.

it could still be the switch, but may need some more diagnosing.

Is it possible there are other electrical issues that replacing the ignition switch out won’t fix?

Anything is possible…you could have a faulty body control module, or other computer as well. This would need looking at by a technician to really know for sure.

Thank you!

Nothing shows on the dash panel…no lights, no gas gauge, no speed…everything seems to have shut down…the sensor must be gone…my mechanic cannot seem to find a solution.

This is not just one sensor that control the dash. You could have a bad instrument cluster, a faulty body control module, or a wiring problem somewhere. A problem like that really needs to be diagnosed in person.

One more question, is this a problem that this model has had problems with, maybe….am wondering if it would be under the warranty, although it is a 2005 Buick Lacrosse.

It is not familiar to me as a common problem on your vehicle. It would not be under factory warranty anymore since your car is out on time, and probably mileage as well. If you have an aftermarket warranty, it may cover the repairs once a technician has diagnosed it.

Thank you so much for your help…I appreciate you taking the time..have a good evening. All the Best, thanks again.