Question about 2004 Dodge Ram 2500
The low pressure line is the larger of the two lines and i believe the low pressure line has a blue cap on the valve, and the high pressure valve has the black cap on it.
Follow the two lines from the compressor, the line that goes to the condenser (to the front of the truck) is the high pressure line. The other line that comes from the firewall is the low side and will have the refill port with a blue cap on it.
Good luck and hope this help. There should also be a sticker somewhere in the engine bay to the amount of R134 should be in the system.
Posted on May 29, 2009
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Posted on Jan 02, 2017
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