After getting my clutch replaced, I noticed a plug was left unplugged on the transmission, underneath the car. It is on the driver's side, toward the rear of the tranny. I have no idea if it was plugged in prior to getting the clutch replaced. I plugged it in. No noticeable difference in anything. Anyone know what this plug is for? It is an 88 GXL na.

 

Over the top switch. Sometimes called a fifth gear switch. Signals the ECU that your in fifth gear, most likely for emission/fuel conservation reasons. I don't really know. Just a guessing. If you had a turboii, I'd say for sure, its to pull in the split air solenoid to supply more air to the catalytic converter.

 

if it has somewhere to plug into, plug it in, chances in it shoudl be there