Join Date: Mar 2009
Location: Kalamazoo, MI
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Yes, now throwing multiple codes including ECM, low supply voltage, APPS and other related. No injector pump codes thank God. Codes have been cleared a number of times now and most recently after new MAP sensor was installed seemed to throw even more of them (?) and seems to throttle itself even more erratically. Both batteries replaced about two years ago (with HD Interstate) and still fine although I didn't load check them, just voltage with a Fluke DMM. Truck turns over fine and headlights are as bright as ever, I'm confident the batteries are good. Terminals are very clean and undoubtably connecting.
Any ideas on wiring connections?