Join Date: Jul 2011
Location: Cologne, Germany
How is the alternator charging? Put a voltmeter across the battery poles with engine ticking over: what voltage do you get? (don't go by the dash gauge for this)
Check battery ground is tight, also where it bolts to the trunk floor.
voltage regulator? it might even squeal if the brushes are really worn....
it is screwed in the back of the alt. itself, comes out easy with 2 screws (easy to get to, if you take off the air cleaner top half)
do a visual check, see if the brushes are long enough, and of even length, or oily perhaps...or worn right down.
Orig. Bosch regulator (Bosch 1 197 311 028) is probably 30$ to replace, same as Audi, BMW, Volvo what have you...
Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.