Looking at the engine, the TCC solenoid is down on the right attached the the side of the transmission. It'* easy to get to. Mine had a square blue harness (with 2 wires) plugged into it. My TCC solenoid failed, and once the tranny shifted into TCC, it wouldnt unlock. That is, when I came to a stop, the car acted just like a manual tranny in 4th gear without pushing in the clutch. Rather than replacing the solenoid, I just disconnected it.
Mine didnt have the Quad4; it had the 2.5L 4tech...the so-called "iron horse".
1993 Bonneville SE, Purple Pearl...The Deuce
Born On Date: 1/25/93 @14:18
187,000+ miles # Parts Fallen Off=(3) # UIM'* Replaced=(1)
# Transmission Mounts Replaced=(3) as of 11/7/06.