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Double check the Harness connection to the Module the clips brake off and the connection will back out or corrode. if so use a Zip Tie to hold them back together. Still searching for ohms on the Module.
Disconnect the four-wire connector to the passenger side glow plug harness (the one with the red lock tab). Using your ohm meter (and the appropriate scale if it doesn't have the auto-range feature), connect the black lead to the passenger side negative battery cable and the red lead to each of the four cavities on the glow plug harness end. You should obtain readings between 0.5 to 2.0 ohms on all four circuits (cylinders #1, #3, #5 and #7). The connectors at the glow plug are difficult to get off without damaging them(even with the special tool). Checking at these connectors avoid messing with them. The fault codes are pretty much right on. You'll likely need to replace both of the ones that have thrown a code. Cyl 2 is front driver side, cyl 8 is back driver side.
Pin #3 on both is the VBattery
Green connector
pin #1 is gp#5
pin #2 is gp#7
pin #6 is gp#1
pin #7 is gp#3
pin 8 goes to the PCM
pin 9 goes to the PCM
Black connector
pin #1 is gp#6
pin #2 is gp#8
pin #6 is gp#2
pin #7 is gp#4
pin 9 goes to the VPwr
