hvac connector pin outs (91 4 wire)
#1
hvac connector pin outs (91 4 wire)
Any one have pinouts for a 91 4 pin hvac connector (engine bay)?
Pin color function
a- lt blue
b- red- battery-on fuse able link
c- green white strip
d- black-ground
Pin color function
a- lt blue
b- red- battery-on fuse able link
c- green white strip
d- black-ground
Last edited by camarotucker; 03-30-2014 at 05:29 PM. Reason: add info
#2
Re: hvac connector pin outs (91 4 wire)
I just looked in my 92 manual. The Light Blue goes from the Pressure Cycling Switch to the A/C High Pressure Switch. I haven't seen anything about the Green/White, though. Ima keep looking, however.
#3
Re: hvac connector pin outs (91 4 wire)
Found it. Dark Green/White goes from the coil of the coolant fan relay to the A/C Control Head (the thing in the car where you choose Max, Vent, etc).
The whole circuit is: Fan Fuse, Coolant Fan Relay, A/C Control Head. When you choose Max, Norm or Bi-Level, it completes the circuit to ground and causes the Fan Relay to switch on, and therefore turn on the fan.
The whole circuit is: Fan Fuse, Coolant Fan Relay, A/C Control Head. When you choose Max, Norm or Bi-Level, it completes the circuit to ground and causes the Fan Relay to switch on, and therefore turn on the fan.
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