Antilock Debugging, 88 5kSQ

[Cap 29100 <cap29100@flash.net>]

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Hello-
I have an 88 5kSQuattro with NO ANTILOCK off capability. (switch does
nothing) I am trying to diagnose it, but I bought the car this way, so I'm
not sure about a couple of things:

1.) is the antilock off warning light supposed to light during startup
sequence?
2.) is the switch itself supposed to be illuminated with the dash lights?
3.) is the antilock off warning light supposed to illuminate with the rear
diff locked?

Now, to get technical:

4.) what is the voltage supposed to be coming into the switch (on terminal
75H), (mine is 0 vdc, 0.027 vac-- seems low)
5.) what should the resistance of the illuminated switch bulb be (mine is
15 Ohms-- seems low)

It seems with my measurements that I have no power coming to the switch,
and I think this is my problem, but I'm not sure.   Answering these quick
quesions would help.   My fear is perhaps my illuminating switch bulb
shorted internally (giving me the 15 Ohms), then drew too much current from
the source (about 1 Amp), frying the supply?...  What is the supply?

Thanks,
Matt Caprio
can reply directly
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