There's not a lot of room under the drivers side to access the wiring so I went the easy route by accessing the start signal from the passenger side.
There's a secondary fuse panel under the hush panel on the passenger side, and it's got a fuse labeled "CRANK". This is the 12V from the start signal on the ignition switch. It's a yellow #12 wire. I spliced in there and routed my wire through the door wiring grommet to the side panel. From there it is routed up along the top of the firewall, zip tied to the windshield washer tubing. I used black wire and black zip ties so that it is very difficult to see.
I positioned the relay just under the ECM and accessed the purple wire inside the wiring loom. I cut and capped the purple wire from the dash side, and spliced in a wire from the relay to the starter side of the purple wire.
I spliced into the accessory wires on the battery cables for the 12V and ground.
Everything is hidden out of sight and can only be seen if you know what you are looking for.
The starter will crank when the key is in the "Start" position.
Every time.
Even if you forget to push in the clutch.
Even if the VATS is triggered, although if it's triggered there won't be any spark or fuel so it doesn't really defeat the VAT's purpose and intent. Even though it'll crank, it won't start.
I did catch some crap from other forum members about the clutch safety switch, but you've got to be really stupid to turn the key withouth having it in neutral or the clutch in. *sheesh*
I've since learned that replacing the starter & solenoid has fixed some people's "No Start" issues, but in my case since my Z only has 10,800 miles, I have a hard time believing that the starter is bad.
I bought my car from a collector buddy of mine. It's first 15 years were spent in a climate controlled warehouse lovingly cared for by a Chevy master tech. It has never seen the rain, nor has anybody EVER hosed the engine down.
Bad starter?
Bah.
Bad wiring from GM?
Much more likely!
TomC
'90ZR1 #792