Marshall wrote:
>
> Hi Volks:
>
> My engine won't run for but a few seconds and roughly at that.
>
> Using the digitool, I see that the AFM is not producing a control voltage. No change in the AFM voltage output as I vary the throttle.
>
> I pressed the connector on tightly - no joy.
>
> I  removed the connector and cleaned the connector contacts on the AFM side with sandpaper. No joy.
>
> My first thought is that there is a break in the harness or some loss of connectivity somewhere, but - I'm not sure.
>
> Any ideas anyone?
>
> Background:
>
> Yesterday the van worked fine, with the rear heater core removed and hoses plugged. Today, I replaced the heater unit, and reconnected the power connector to it. I can't see how this affected anything, but it's the right thing to mention this.
>
> Currently, the connector to the rear heater core circuit is ON. It made no difference when it was off, either.
>
> Marshall Ruskin
> 84 Westy

Pull the AFM off and test it with an ohmmeter as per Bentley.  Don't
expect the resistance to change in a sensible way, but it should change
when you move the vane.  There should be some reasonable continuity from
the slider to each end of the resistor string ( a few thousand ohms or
less).

Larry A.