1978 450 SL electrical problem

[triptrish]

I keep having trouble keeping a charge. I just replaced the battery last month, as well as the alternator last summer.

What else might be causing the problem? Is there a voltage regulator that could be bad?

Thanks,
Don Solomon
Durango, CO
USA

[ScottinSoCal]

Originally Posted by triptrish

I keep having trouble keeping a charge. I just replaced the battery last month, as well as the alternator last summer.

What else might be causing the problem? Is there a voltage regulator that could be bad?

The servo is a known problem that can cause the battery to drain. Mine went bad and managed to kill the car while it was running. Try disconnecting the electrical plugs on the front of it.