Would you believe the connection pin for the coolant sensor (for the gauge) pulled out!?    

I had to replace the bullet connector and thus the whole wire, and while I was pulling out the slack, the thing suddenly got loose, so I kept pulling and there was the end!  FYI, the pin has a wire that goes through the sensor body, to the base of the sensor, where there's a little washer-like thing that probably generates the resistance for he gauge.  The sensor is hollow.   It's not leaking coolant.

BTW-  can you get the connector for the other (EFI) coolant sensor?  It looks like a fuel injector connector, but the groove is offset, probably so you don't plug it onto the wrong thing.  The wires broke off inside the old factory connector.

I still plan to put on a kill switch for the new module.  Would you prefer to break te switched 12V line, or the connection from the + pole on the coil to the B terminal on the  module?  I think the first location would be preferred, as that is what occurs when you turn onn the keyswitch.  I have a remote 10A relay that would be  ideal for that.