88 5ksq Charging Problem

[Huw Powell]

> I have an 88 5ksq BTDT charging system question.  Here's the scenario:

> 1. Tested voltage at battery with engine on  (3k rpm) ...whoa!16 volts!
>
> 2. Replaced voltage regulator, repeated step 1, voltage now at 15 volts... (still a bit high I thought)
>
> 3. Have alternator bench tested... assured by technician that, aside from miniscule fluctuation after 10 minutes, Bosch alternator "could last another five years".  Technician suggested that I check grounds.
>
> 4. Tested continuity of main ground between firewall and valve cover stud,  looked pretty solid, but had that "powdery" deposit in a few places...didn't ohm-out wonderfully either,...relpaced unit with brand-new ground strap.

You have more grounds to check (might as well include the positive
connections, as well).

battery to chassis and alternator to bracket/engine block, are two that
come to mind.

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/