[ke6dcj]

Thought I put this all together for posterity sake:

Symptom:

Engine will NOT turn-over. That is, the starter will not operate.

Here's a basic description:

Ignition Switch (S2/1) via PIN 50 (VI) connects to Starter Lock-out Relay Module.

Starter Lock-out Relay Module (K38) on is connected to S2/1 on pin #1 of Relay.
K38 is located behind instrument cluster.
Short pin#1 and pin#3 to by-pass K38.

Neutral Safety Switch (S16/3) is connected to K38/pin#3 via connector X49/2 on pin#7.
S16/3 is located on the transmission.
Short pin#7 (VI) and pin#8 (VI/WHT) to bypass S16/3.

Starter Solenoid (M1) is connected to S16/3 via connector X27, on pin#1 (VI/WHT).


In short:

Ignition Switch --> Starter Lock-out --> Neutral Safety Switch (NSS) --> Starter Solenoid

After verifying all fuses esp. Fuse B and Fuse C (which control relay K38), strong battery & ground, and 12VDC at Alternator B+ distribution block (behind LH box), it is easier to start diagnosis at the END of the chain (e.g., starter solenoid).

Disconnect connector X27, and while in PARK or Neutral, jumper the CENTER pin (male, pin#1. VI/WHT) to the B+ distribution block.

The solenoid should audibly engage and the starter should turn-over the car.

That is, if the engine turns over, then you work your way backwards measuring voltage (or using a diagnostic light) and jumpering to find the faulty part, wiring harness, and/or connector.

You can also hookup a voltmeter or test-light to the center female connector X27 to verify that turning the ignition switch is also providing 12VDC.

:-) neil

PS: in my scenario, the solenoid is receiving power, but not engaging, so I'm going to replace the starter/solenoid assembly and the harness while I'm in there.