Where is the no power to AC compressor switch?
2000 Peterbilt 379. No power to AC compressor. Power is at switch on dashboard, but can’t trace power past switch. What wires from switch take power to the compressor. Pressure switches appear to be closed. What terminals on AC switch are hot when switch is closed? Thanks for any info.
Where is the power to the AC compressor?
No power to AC compressor. Power is at switch on dashboard, but can’t trace power past switch. What wires from switch take power to the compressor. Pressure switches appear to be closed.
Where does the power for the compressor clutch come from?
Power for the compressor clutch comes from the relay in the fuse panel. The pressure switches are on a ground circuit. You can unplug the wire and jump across with a paper clip to test if the pressure switches are closed. zircon Thanks this. Thanks, SL3406. Had actually checked that already,and that’s not the problem.
Why is my 2003 air conditioner not working?
Owners of 2003’s may comment about poor A/C performance after they have pressed the A/C button and see what appears to be the snowflake illuminated on the display. What has actually happened, though, is that they have disabled the operation of the A/C compressor and the snowflake symbol, upon closer inspection, has a slash through it.
What happens if the AC compressor relay goes out?
Without this relay, the AC compressor will not have power and the AC system will not function. The AC compressor relay is no different then other electrical relays – its electrical contacts will eventually wear or burn out, and the relay must be replaced.
How can I tell if my AC relay has a problem?
AC compressor is not turning on. One of the most obvious signs that the AC relay may have a problem is that the compressor is not coming on at all. In most cases, when the AC is turned on you will be able to hear the compressor switch on.
What does it mean when a relay does not click?
If you hear or feel the relay click, the relay and its wiring aren’t the problem. But if it’s not clicking, the problem could be in the relay itself or in the wiring.
Where does the power come from in a relay?
1 Terminal 86 supplies power to the relay’s internal electromagnet. 2 Terminal 85 grounds the electromagnet. 3 Terminal 30 supplies power to one of the internal switch contacts. 4 Terminal 87 connects the other internal switch contact to the device controlled by the relay.