WTBorrow: known-good 944 turbo 28 pin DME
 

... I think ...

My 88 turbo S has long had an issue where it occasionally would crank but not start until you futzed with the crank sensor harness. Now that it's sat for a couple of years, crank-no-start has become a permanent condition.

I'm testing spark by the old standby of sticking a phillips-head screwdriver into the coil lead and making a gap of ~3/8 to the engine. No spark observed. Fuel pump runs and there's plenty of stale gas smell, so I'm pretty sure I'm getting the other 2 parts of the triangle of fire.

Tried so far:
* Jumpered the KLR to remove it from the equation
* Verified that there's no alarm box
* Tested resistance of crank sensors at DME connector - each about 1M
* Tested AC voltage of crank sensors during cranking - ~1.5V for the RPM sensor, ~.5V for the TDC

I suspect the DME because the battery box has been leaking. I opened the DME to see if there was any obvious damage, none found although several transistors clearly have been changed in the past and some joints reflowed.

At this point it seems right to rule the DME in/out. Anyone got a spare 28-pin DME to loan?

Jerome is a man among men: I now know it's the KLR.