I have a 985 110, 300tdi and I replaced my battery with a Optima red top battery and now my battery light is on. I am not having any issues starting the truck but the battery light stays on. Has anyone had this problem?
I had this problem once.... until the truck died after the battery was discharged completely and I stalled (it took about 5 kms or 3 miles). It was a defective alternator, which I replaced. The pulley had beed mis-installed by a mechanic and was slipping, thus not charging and stripping the shaft. I replaced the alternator and got the old one rebuilt (new shaft).