Where is the AC low pressure switch?
 

Can someone tell me where the low pressure switch is located on a 1992 SL1?
Also, if someone can point me toward instructions on how to replace it that wold be much appreciated.

Thanks

AC low press/high press switch are are combined in a single housing. Located in the metal refrigerant line over by the battery (along the edge of the driver's side of the engine bay if I remember correctly.

You'll need to recapture the refrigerant in your system to relieve the system pressure before unscrewing it to replace

what makes you think it's bad?

I gotta agree with Derf on this one ... I mean, it's possible that the switch has failed, but it's not something that happens very often. Remember that its a "trinary" switch, and will actuate if the pressure is too low OR if the pressure is too high..........