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Message: [QUOTE="Wayne, post: 1282120, member: 863"] Wait to start light has nothing to do with proper function of the gpr. It only tells you that the pcm has commanded the flow plugs on. Also, if it is cold outside, cycling the key is really only a placebo because the plugs stay on long after the light goes out unless the engine is already at operating temp. Sometimes about 2 minutes after the truck has started. If you have an in cab battery volt meter from a cts or whatever just watch when the voltage rises above 12 koeo or above 13 koer. That's when they shut off. If you're worried about it starting, just cycle the key on, go jam a wrench or screw driver between the top posts for 30 seconds or so, then start it. If it still hates you, test the plugs. Easiest way to do that is to pull the valve cover harnesses, and stick a test light connected to the battery +, then on to the glow plug harness pins. If the light turns on, the corresponding plug and wiring is probably good. The proper pins are the fat ones on the out sides on the connectors. Super duty is the front 2 and rear 2 of each of the 2 connectors (1 per valve cover). For the obs, it the front pin and rear pin of each of the 4 connectors. [/QUOTE]

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