Hi yall i have a 1991 300D 2.5 Turbo w124 with a strange electrical problem>>>
The battery is not being charged and its a brand new battery also it is a brand new alternator,,
---They both test well separately outside the car at test bench.
when put in the car the battery is not being charged if you do an alternator check with a tester sold at the local auto shop as the car is running the test says alternator voltage BAD if you press on the gas pedal it starts saying alternator voltage GOOD!!!!
---I replaced the OVP overload protection relay a while back when the tachometer and AC was not working and it was not charging and that solved the issue. So when it started doing this i changed the ovp again and boom it was charging the battery but no AC and reverse lights!!!!
---So i went and returned that ovp got another one thinking that it was just bad luck now the new symptoms are the one expressed above everything works ac and lights and tach but no charging of the battery i must say that when you have the AC at full fan speed the ABS light will sometimes come on as the car idles and go away when you press on the gas, tach works fine etc.
What can it be and how can i trouble shoot it further more?? cause its tiresome to get out and jump start the car with a portable jumper everyday in the trunk
any help will be greatly appreciated
thanks
Denis