Update: Still no joy. The 3 wire harness carrying ignition wire, 87 DME pin wire, and DME 12v constant wire was found to NOT be as advertised. This is a factory correct car and harness. Unmolested. There is one additional wire black coated/red wire 11 gauge that connects to positive terminal. It is NOT a part of the 3 wire harness. It is the DME 30 pin wire. It travels to the main harness just aft of the fuel filler nozzle to tank junction, where it joins the main harness run to the DME. It emerges from harness (exposed) as a RED wire and continues to pin 30. All DME functions good, proper.
Now engine will not spin/crank. New ignition switch a few hundred miles and 9 months ago. Will check main battery cable to starter and then the solenoid jumpers to see if problem is there, or it is ignition switch. All ground points are cleaned and reinstalled. The mystery wire black coated/red had a break about one inch from positive terminal at battery post.
Words of wisdom, please??
Thanks to everyone, especially, Dennis, and Sal, for procedural steps and isolation. Still have hope it will again run!
