Quote:
Originally Posted by sixto
The dial is a trimming plug for idle control. Turning the knob should raise or lower idle in 25 or 50 rpm increments.
The big resistor is probably for the low speed setting of the auxiliary fan.
Sixto
93 300SD
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Thank You !!! It make sense that the resistor is for a reduced speed to the fan, as that would be a bit of current.
The Idle control doesn't actually turn. It's a plug, which must be pulled and reseated in one of the other positions. I never would have guessed it's purpose, and I don't think I ever played with it while the engine was running.