94 Rover LWB - cleaned coolent sensor, temp sensor, stepper motor and replaced some pressure lines and went to fire it up and it won't even turn over. Battery was disconnected from the start and shows 12volts. Does anyone know what safety feature is keeping my truck from even trying to turn over? What are the things to start going thru to diagnose? The temp gauge light goes on when I turn the key to start position but I don't recall if it has always done this before starting. Any help would be huge, Thanks.