[ischmitz]

The pins inside the connector of the DME are labeled. When you look at the DME at the black connector pin 1 is on the upper row at the right (where the metal clip is). Count all the way over to pin 18 on the upper row. Then start on the lower right again for pin 19 and all the way over to pin 35. Use a flashlight and magnifying glass and you can see the numbers. That will help you to find the correct pin on the harness connector. That information will help you to find the correct location on the DME harness connector. That is where you want to measure.

When testing for +12V I would use a test light and a MultiMeter at the same time. Connect one side to GND (chassis) and the other to the pin in question. Then measure the voltage across the test light with the ignition in ON position. Same for GND. Use a known good source of +12V and then test the GND points.

Internally all GND points are connected in the DME. So it is not very likely that you will find something with the GND.

I would focus on finding out if you miss fuel and spark. Does the exhaust smell when you crank for some time? If not, make sure the DME is powered (ICV is vibrating) and then on to the sensors. If they check out it could be the DME itself requiring repair. There is one failure mode where it won't detect the flywheel signals any longer. It requires parts replacement.

Remind us: is this problem intermittent or permanent? I remember I read something in the beginning suggesting it happens only sometimes. If it is permanent, I would suspect the DME. If it is intermittent the sensors (speed, reference) are my first guess.

Good luck,
Ingo