Cat D6 A/C

[Tenwheeler]

????00D6FUFBH0260 Has about 100 Lbs freon charge and appears compressor will not engage. All of the fuses and breakers at the right door hinge ares test good.
Air flow in the cab is good.
Snow flake on the A/C switch lights up when depressed.
Pressure switch behind compressor has power on both sides.
Two other two wire connectors, below the alternator, show no power with a probe at the back of the connectors. They are hard to get to and would have to remove the alternator to possibly unplug and test them better.
Wondering if there are some relays and such somewhere? Anyone have a wiring diagram for this machine?
Thanks for any help available.

 

[nowing75]

????00D6FUFBH0260 Has about 100 Lbs freon charge and appears compressor will not engage. All of the fuses and breakers at the right door hinge ares test good.
Air flow in the cab is good.
Snow flake on the A/C switch lights up when depressed.
Pressure switch behind compressor has power on both sides.
Two other two wire connectors, below the alternator, show no power with a probe at the back of the connectors. They are hard to get to and would have to remove the alternator to possibly unplug and test them better.
Wondering if there are some relays and such somewhere? Anyone have a wiring diagram for this machine?
Thanks for any help available.

i was not able to pull up that s/n

 

[heymccall]

D6K XL FBH prefix

 

[heymccall]

Wrong serial number, but relay location is same, in this thread...

D6k Ac compressor has no power.

Does anyone have a schematic on this? Someone chopped up the harness behind the compressor presumably to bypass something but I have no clue what they did or which of these 4 plugs go to the low pressure switch, refrigerant switch or the compressor.

www.heavyequipmentforums.com

 

[Nige]

Anyone have a wiring diagram for this machine?

I can send you one but can you confirm the last 8 characters of the PIN. They will be FBHxxxxx. In your OP you have FBH0260 so the S/N only has 4 digits not 5.

There is a break at FBH01045. Above & below that are different electrical schematics.

 

[Tenwheeler]

 

[Tenwheeler]

02601 in the door jam. Thanks.
Found 2 relays on the right side of the seat under a control panel. Both have power all the time. No other power with key on and turning on A/C. Swapped relays, compressor still did not come on.

 

[Nige]

OK, so the S/N is FBH02601. The "1" is partially obscured by a scratch on the plate.
In this case the correct number is really important because there are no less than 4 different schematics depending on S/N.
Schematic on the way. Check your messages.