Compressor not getting power

From : bob

Q: ive been trying to diagnose my ac problem. when i turn on the ac switch i get fan but no ac. the compressor clutch does not engage. i disconected the compressor power source applied power to it and could hear the clutch click/engage so i think the compressor works but is not getting any power. i checked and changed the fuses. i assum power goes straight from battery to dash switch then to complressor but cant figure out where the problem may be...any thoghts would be greatly appreciated. i have a 1999 ram 1500. thanks .

Replies:

From : tom lawrence

ive been trying to diagnose my ac problem. when i turn on the ac switch i get fan but no ac. the compressor clutch does not engage. do you have gauges to check the pressures if not pull the low pressure switch connector off the accumulator round cylindrical-looking thing close to the firewall on the passenger side with a/c lines running from it and jumper the two pins on the connector. with the engine running and the a/c selected if the clutch engages youre low/out of refrigerant or have a bad low pressure switch - but most likely the refrigerant leaked out. .

From : bob

ill give that a shot...thanks for your help! .