oh alright I wasn't sure if you could do that with a 93.

just checked it, just good old code 12

what could be wrong if the 2 right hand heat settings are engaging my A/C and drivers side fan?

 

2 middle vent settings, they are fine....you're referring to the vent (face) and heater (floor). Fan should be off until proper fan turn on temp.

If you're referring to the 2 right side heat settings (defog and defrost), then your fan will turn on. They run the A/C and the radiator fans when the temp outside is above 4 degrees C. (40 degrees F). Since it was probably colder than this outside in Michigan back in March, your fans were staying off.

The A/C will click on and off when the outside temperature is too cold. Not enough pressure in the system when it's cold outside. It protects the A/C from too low of pressure (I believe)

EDIT: I see you have a 93 which had a different cooling fan setup (1 and/or the other fan on/off) from the later models (both on or both off)

 

wow that's good news, thank you so much

 

If the compressor is kicking in in the two heat settings you describe the fan will ALWAYS kick on due to the flag in the PCM for "A/C request" being set to true. Is this the defrost position or defrost and floor position ?
The A/C compressor is ONLY off in FLOOR ONLY or VENT ONLY position even if the heat **** is in full HOT.

 

just buy a toggle switch and 10' of wire, take the hot wires from both fan motors and run the switch through the firewall and mount in under your dash, easy $5 fix

-Chris