Why is the AC not working on my Freightliner Columbia?
If you have power to high pressure, then the connection between the high pressure switch and low pressure switch is the fault. Power goes this way. Head unit (controls in cab at dash or main switch) to plug at firewall. Then power goes to high pressure switch. The power then goes to low pressure switch. Then power goes to A/C clutch.
Why is the head unit on my Freightliner not working?
The fuse and relay are ok. Head unit is the main switch in the dash. If you have power to high pressure, then the connection between the high pressure switch and low pressure switch is the fault. Power goes this way. Head unit (controls in cab at dash or main switch) to plug at firewall. Then power goes to high pressure switch.
Where does the power go on a Freightliner Columbia?
Head unit (controls in cab at dash or main switch) to plug at firewall. Then power goes to high pressure switch. The power then goes to low pressure switch. Then power goes to A/C clutch.
Where is the binary switch on a Freightliner?
The binary switch is also the high pressure switch. It’s just before the condenser. That’s the 4 wires on the switch. Two are for the fan and 2 are for the a/c clutch signal. Follow the wires and how the harness runs along the radiator support up to low pressure switch on receiver. That’s the harness to check.
What is the wiring diagram for a Freightliner Columbia?
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How to troubleshoot problems in Freightliner Trucks?
If you think the AC system on your freightliner truck needs to be recharged, don’t’use the unit until you have the system recharged because it could cause a critical failure of the compressor. I am a Registered Financial Consultant with 6 years experience in the financial services industry.
What was the wiring diagram for a 2006 Freightliner Cascadia?
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What does an evaporator do on a Freightliner truck?
An evaporator is used on freightliner trucks as a heat exchange medium to move the heat generated by the system away from the air conditioning unit. The most common problem with a freightliner AC system is a leaking compressor.