Fahrer

That process clears the charge in capacitors which can solve problems.

Jlewis1436

Firstly, the AGM battery that I purchased stopped working properly. So, I switched back to a standard non-AGM battery. However, now I'm facing a new issue. The battery is perfectly fine and the car runs smoothly without any problem. But, as soon as I plug in my seat belt, a battery warning light pops up. Even when the car is idling, the light won't come on if my seat belt is not buckled. But, the moment I buckle up, the battery warning light appears. Driving without a seat belt is not a solution. I have a Durametric but not very skilled at what I'm doing with it TBH.

BillB128

Is it possible to that a rodent might have chewed some wires? All your issues while electrical, seem very random.

Jlewis1436

The car was just fully serviced by an amazing indy shop. Redid the front-end suspension, and alignment, all fluids were flushed and replaced. They told me the battery wasn't great but knowing I'm pretty mechanical he said just do it myself and avoid a charge. None of these strange things happened until the battery was changed. The car runs and drives great.

Update: I ran my Durametric today and cleared every code that I could find. A P1699 is what keeps tripping. I spoke w my indy today and the car is going back Weds. Might be a module, might be the ground cable going to the alternator he thinks. I guess there was a service bulletin about this cable on the 997. He said he's done about 10 of them. Let's hope it's a simple find and fix. Will update in case someone in the future is going mad as well lol!

Ailerons

Potentially a similar situation over here. Car would not start yesterday, only clicking and lights flashing inside the car. Picked up a new H7 AGM battery today and then went to install. Immediately upon connecting the negative, headlight washers, windshield washers and horn all go crazy. I’ll try the negative and positive battery cable idea and reattempt tomorrow. Did you end up finding a solution?