Not sure if there is something on here about this but been having this problem for a while now I have replaced all the glow plugs the glow plug control module the harness and the thing will still throw the check engine light it will not come on for two or three days and then for no reason it will kick it on I've tested them with a ohm teaster and they all seamed to test the same there is 12v coming out of each leg of the harness 12 volts going in I'm at a loss can't thing of what else to change besides the hole wireing harness on the motor anyone have any ideas

 

anyone?