The issue I am going after on my 90 Reatta is that when I first turn it on, none of the instrument panel guages work except the engine service light. Also, the air conditioning swivel vents on either side of the dash and glove box do not work. If I wait, the gauges do start to work including the speedometer and the tachometer. I drive it for a while, then the engine just quits, the gauges quit working, and I am left driving a car without power steering or brakes, not a fun task in heavy traffic. I pull over, then usually the car starts right up again, I wait, the gauges come back on, and off I go, until everthing stops again. I figure I have a faulty connection that works only when it is contact with the ECM, and then it looses contact. I understand the module for the AC is near the ECM and could inadvertantly get bumped or disconnected (as by the mechanic who looked over the wiring). If the ECM is below and behind the glove box, it seems it would be pretty easy to disconnect some other wiring. Also, I assume if I take a look at the ECM, I should disconnect the car battery negative groundd???