Hello,
Updating my 1991 Comanche to have working AC once more. Having trouble with the classical AC compressor won’t engage problem while trying to fill with r134a. Tons of searching here, elsewhere, etc have not solved my problem. Perhaps I am
not searching correctly or using the wrong tags.
-all new parts throughout system (evap/compressor/condenser/drier/lines.
-attempted to fill with 134. Noticed compressor not engaging.
-went straight 12 v from
battery to compressor, verified clutch engages.
-jumped across coolant temp sensor in thermostat housing, no effect
-jumped low pressure switch,
non effect.
-new relay.
-removed relay, jumped across pins 30 and 87. No clutch engagement.
-Measured voltage at terminal 30-only getting 2.4 bolts, not 12.
-Verified compressor feed line sees same voltage at terminal 30-2.4 volts.
-Voltage at pin 30 drops to 0 when I turn ac off in cab, and comes back when I turn it on
Where am I going wrong?
