ekennedy21 Posted August 10, 2020 Share Posted August 10, 2020 Getting the A/C going in my Superliner. The truck has the later A/C unit inside in it, but the compressor was gone when I bought it. Where do the wires from the compressor connect to. There appears to be nothing on the motor side of the firewall for the A/C. Quote Link to comment Share on other sites More sharing options...
mrsmackpaul Posted August 10, 2020 Share Posted August 10, 2020 One should go to the block The other should go to the thermostat I would think How many wires does it have ? Paul Quote Link to comment Share on other sites More sharing options...
Miami Cossack Posted August 25, 2020 Share Posted August 25, 2020 (edited) Start by finding the low pressure switch. See if anything is plugged in there. It has to pass through the low pressure switch to power up the A/C clutch. Then it goes through the clutch windings and leaves the clutch and grounds, as to where that varies. There may be a diode in the positive side. It may help you see where they cut or hid the wiring. It will be a two wire switch. Edited August 25, 2020 by Miami Cossack Quote Link to comment Share on other sites More sharing options...
ekennedy21 Posted August 25, 2020 Author Share Posted August 25, 2020 Its all set. What i was looking for was what terminal on the cab junction box on the firewall you wire the binary switch to. In case anyone else is ever looking its the #4 terminal on the one closest to the driver door. What threw me was the A/C thermostat was also bad so when i was testing them I wasn't gettin power to it. Quote Link to comment Share on other sites More sharing options...
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