The A/C Klima relay only controls the compressor. I don't remember if '89 uses a
relay. I don't think so. I believe '89 uses a MAS relay. [MAS is Motor Aggregate
System] MB combined
the fuel pump relay and Klima relay into one big $$$ unit.
Open your hood and release the stops so it stands straight up. Remove the
plastic cover between the
battery and the firewall. You will see a few things back there..... The two
largest are the FI
control unit and the ABS control unit. Do you see any slightly-larger-than a
pack of smokes? Black
and standing up? Or a larger one with a turn knob on top? If a turn knob, that
is the MAS relay. If
2 small ones, one will say RPM on it; that is the fuel pump relay. And the other
will say Klima.
But neither control the blower. Your '89 should have the aux fuse holder on top
of the drivers strut
mount. It will have a 30 amp strip fuse in it. It is probably cracked......
You da MAN, Karl. It would be nice if I could've found this thing
before summer started.
Question, do you see any issues with replacing this strange fuse link
with a new fuse block and a more standard fuse?
Thom with AC again.
Yes, there is a problem. That is a 30a strip fuse, slow blow. The blower motor
pulls way over 30
amps when starting. MB originally used a 25 amp fuse in the main fuse box and it
was melting and
setting the fuse box on fire!
Put an ammeter in instead of that fuse and run the blower at high speed. You
will see 32 amps!!!
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