Need location of ac low port on 97 2500 diesel

[LarryH]

Hi, new here.

Saw the thread on a 97 1500, but not sure if was diesel or gas. I have traced the pipes and hoses and it looks like the handy port by the right headlight is coming off the condenser and would be high pressure. Please let me know if I am wrong ( I hope I am).

Thanks,
Larry

 

[crash68]

With 134a the High and Low side ports are two different sizes, the low side will not fit on or open the high side access port. The refrigerant recharge cans bought at the auto parts stores only fit the low side.

 

[LarryH]

The only small port I can find in the system is in the front right corner of the engine compartment and is on a small diameter tube coming off the condenser. This would make it a high pressure gas. I've looked from the firewall to the compressor and find no low port, actually no port at all on lines coming from the evaporator.