Compression Ignition Addict
Join Date: Aug 2010
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determining if its working, i dont know, yet. But, the silver moduile, on the p/s vc, is the gp control module which controls both gp's...the other "relay' is the AIH one. Any non-CA truck, will have 2-aih relay looking solenoids, one for aih, other for gp's.
There is a 9-prong element, i've seen out there, hooked up to the gp module, then, fed into cab, registering 9-led lights, to signify if EACH gp is getting charged...
99.5 x-cab 7.3l, 6spd, 161k miles.....