AboutCandido Figueroa Expertise Most questions on automotive air conditioning service and repairs.
Experience Completed Education in 1984 and started my own business in 1987. Have owned and operated an automotive air conditioning reapair shop in South Florida since 1987.
Organizations Mobile Air Conditioning Society International Since 1992
Education/Credentials Miami Lakes Technical Education center 1984
Question I have a 2005 Chevy Silverado, was driving down the road and the A/C quit. Put the gauges on, has plenty of pressure. Jumped the relay, a/c compressor runs, with no problems. Tried jumping the low pressure switch, no change. From looking at the wiring diagrams (Hayes manual- generic) it seems that the PDM is not grounding the relay. Any thoughts?
Answer Hi Joel
Unfortunately GM truck are hard to diagnose without a scanner. The best one are at the dealers but most of the time the techs don't know haw to read them. From experience it can be one of the 3 or 4 sensors that the system has. Two ambient temp. sensor one in front of the bumper the other at the rear view mirror area, but have never seen that one. You also have one in car temp. sensor. Its not easy to tell which one is cause the fault to computer. Most of the time the one at the front bumper is the one. Must be checked but I still have not found anyone including the dealer techs that can figure it out the first time around.
