[TheMonkey]

Thanks Stuart-

I think I may have something wrong with my 'Shunt F' circuit or 'Series F' circuit - as seen in the diagram above. When the motor is off, the 'relay coil' is closed. So, when you measure from low speed ground pin (top pin when mounted in car) to ground, it can be either:

1) ground strap unhooked from case, measured from pin to case = 'Shunt F' & 'Series F' in series
2) ground strap unhooked from case, measured from pin to ground strap = 'Ballast Resistor'
3) ground strap hooked up to case, measured from pin to ground = both of above situations measured in parallel.

'Shunt F' & 'Series F' are inside the motor housing.

On your spares, you measured:

pin -> ground case at 20 ohms. Was the ground strap connected to case? Measurement can be made to only ground strap if it is not leaning against case where it enters - leans only against the circuit board.

Mine are:
Situation 1) 5.3 ohms
Situation 2) 20.3 ohms
Situation 3) 4.3 ohms

This foots with resistance calculator (inverse of (sum of inverse))

For reference, the brass ground strap is the circled link in the diagram:



I really appreciate the help, thanks.

Scott.