I don't know about the 91, but the 04 has the high/low switch in the liquid line[the small line] over on the passenger side adjacent to the condenser[in front of the radiator] Look for a sensor with electrical leads.
You can bypass the AC low pressure switch, on your Toyota Corolla, by removing the switch. You can remove the wiring to the switch and leave the switch and place.
Location of oil pressure switch 2003 VW passat
The 1997 Toyota Avalon air conditioning low pressure switch can be found on the top of the air conditioning compressor. The low pressure switch will be labeled as the low pressure port.
Type your answer here... oil pressure switch location
where is the oil pressure switch located on a 2004 monte carlo
on a 2005 Honda Accord where is the low pressure AC switch
If it's a v-6 the oil pressure switch is at the front of the engine below the alternator mount.
Turn the key to the on position and hit your gas pedal I believe 3 or 6 times, and it should turn off
The air conditioner low pressure switch in a 1993 Toyota SR5 is behind the glove box. There are three screws inside the glove box to remove for access.
A 2000 Toyota Camry has an ignition switch fuse location in the main fuse panel. It helps protect the switch and the rest of the ignition system from surges.
The Honda Odyssey power steering pressure switch is located on the firewall in the engine compartment. The pressure switch will be on the drivers side of the firewall.
The 1998 Toyota signal relay switch is located below the dashboard, on the drivers side. The signal switch simply plugs in and out.