Weird charging problem

blastinbob · Post by **blastinbob** » 03 Jun 2004, 17:45

I have a 88 240dl my charging problem consists of this when I put it on a meter running it shows 13 volts and when I disconnect the battery it goes to 14 like it should I have tried 2 batteries and it is not that when I turn on lights it goes to 12 and eventually kills the battery this is also the 2nd alternator and it seems ok with batter disconneted any help would be apprecitated.

LaRy · Post by **LaRy** » 04 Jun 2004, 11:22

Check the grounding of the engine. From the car body it is going a blue thick cable to the battery minus pole, continouing to the starter. This cable can be dammage by corrosion or broken by vibrations. Especially when passing under the front underside of the engine. Probably you have one more ground connection at the back top of the engine. You seems to have a voltage meter. Check with the voltage meter if you have a voltage difference between the engine block and the car body. If you have a clear difference when the engine is running and the head lights are on, you have a bad grounding.

jeffrobodine · Post by **jeffrobodine** » 12 Jun 2004, 20:09

LaRy is right(as usual) i went through 8 thats right 8 before i figured out to run a new ground now its chargin perfectly.