Everything you needed to know to get you started diagnosing a no-start on the vehicle you describe was given in the last thread. Yet, you still come back to electrical questions that will get you no closer to being back on the road. You can remove the "mass air sensor" entirely...wires and all, and this model 300D will still start and run. As a matter of fact, you can remove the intake completely, crossover tube and all and the car will still run. I have done it.

If it seems as though there was a lot of criticism of the shop/mechanic, it is because you are describing work done or in progress that is irrelevant to the correction of this situation. You can either take the advice of the people here who have tried to help (who actually own this model and/or have years of experience with them), or continue to chase circuits that will not aid in the resolution.

I'm sorry if this seems curt, but you have asked advice, but seem to want to "do your own thing" rather than follow it. This wastes time...both yours and those responding.

__________________
-Louis

'87 300D Anthracite