92 RS L03/M5
I swapped starters today because of a slow start heat soak issue. When complete no crank. Everything else works.

I swapped the old starter back in, same problem. So I reinstalled the new one.

Vats was bypassed via resistor long time ago. Security light is not on when attempting to crank.

I bypassed the start enable relay, to make sure the relay wasn't bad.

I bypassed the clutch switch.

I pulled the lower harness with all the starter leads up through the engine bay. I tossed all the loom and inspected. Found a spot in the purple "s terminal" wire that was pretty beat up, and another previous repair. Everything else looked good. Repaired purple line and reloomed/ installed.

I have 12.4 V at the hot lead to the starter.

Under "crank" conditions I have 12.0V to the hot lead and 11.8V to the "S" lead at the solenoid.

I've spent half the day running through similar threads with no solution. What the heck am I missing here?

 

Possibly another bad starter. The purple wire goes on the terminal closest to the block. Take a screwdriver and jump across the big battery cable terminal to the inside terminal and see if it cranks. Easier done on a lift, and make sure it's in neutral...

 

Ok, the wife just got home. I got her in the car, and had her crank it. I can hear a slight click from the solenoid, and feel it when I put my hand on it. I have a clear shot of the armature and its not even attempting to engage.

Bad starter? It is brand new.

 

Its the damn starter.

 

Brand new or reman? Even brand new rotating electric can be a problem. Used to use alot of new NAPA stuff and stopped after a slew of failures. Have had pretty good luck with Delphi new. AC Delco reman is probably the best reman line. Any other is a crap shoot. Emphasis on crap.