[V8] servotronic connection on 90 V8?

dsaad at icehouse.net dsaad at icehouse.net
Wed Oct 13 10:20:50 EDT 2004

Are you sure? Where does the speedo out voltage get turned into a current?
When I traced all this out for my bad speedo sender, I thought the ECU, Climate
Control Head, Cruise Control, Auto Check, and Servotronic were all fed the same
voltage out from the speedo.

I am not suggesting the servotronic control unit be removed or bypassed, just
fake out the input to it. That is as simple as a rheostat - no?


Quoting "Buchholz, Steven" <Steven.Buchholz at kla-tencor.com>:

> ... in point of fact it is a variable current ... I don't know what the
> allowable range is, but if you simply hooked a rheostat between +12 and
> ground and fed this into the rack you would more likely than not cause
> damage ... secondarily, if there were any variation in the current to
> the rack it would impact the amount of assist that you would be getting
> ...
> Steve B
> San Jose, CA (USA)
> >
> > If you really want to - the input to the module is in fact a variable
> > voltage derived from the speedo. You could probably fake it
> > out with a
> > rehostat if you were so inclined. I am quite happy with the
> > servotronic
> > though. I do a lot more parking than cruising at 140.
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