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Update: I Let the truck sit out last night without the block heater plugged in. It got down to about 25 degrees. Two cycles of the gp's this morning and it fired up like mid summer!

Truck has been starting better than it ever has all day long today. I'm letting it sit outside tonight to get cold and see how it fires in the morning. Still plan on swapping that resistor.

Trust, but verify! It's our QA's motto! Thanks again!

I think I'll just bite the $75 and replace it with the proper relay. At least with the 12v mod I won't eat glow plugs as fast. Thanks for the advice! Having a backup push button is a good idea. I've read several posts on how to wire it, but never thought of having one as a backup. It'll...

I'm getting 12.48v into the top of the relay from the 12v bus next to it on the firewall. The front battery reads about 12.56v. When the truck is in run and the wait light is on, I get 10.2v out of the bottom post of the relay. Looks like my relay is bad. Since I've bypassed the resistor...

Well, I got the truck started. I figured since I had had the injectors out, I should re-bleed the fuel system. After the bleed, with the pedal to the floor, it fired, died then fired and stayed alive. I am cautiously optomistic, though, as my glow plugs are only getting 10vdc. Still...

Ok, two things are going on right now. 1. My relay is not cycling/clicking. 2. I am only getting 10v out of the bottom of the relay when the 'wait' light is on and the truck is in'run' The obvious thing to me is that the relay is bad. Am I correct? I have a new set of AC 60G glow plugs...

Alright, busted tips removed and truck is back togather. I have removed the resistor on the firewall and plan on converting to the 12v glow plug system. To do this, I need to buy a different gp relay, right? I've heard mention of the ford relays?

What exactly do I have to remove to get at the pre-chamber? I keep seeing 'removed the injector' referenced here and am digging through the TM's, but haven't found a clear answer, yet.

Well, even with the tool I broke off two plugs. Time to go fishing. I just remove the injector, to get at them, right? Cliff - yeah, that's kind of what I'm figuring. I'm just going to bypass the thing with a manual switch.

I just picked up the gp removal tool from a buddy. I should be able to get them out, now. Still wondering why they went bad like that, though...

Well here's a fun update. I finally found time work on the truck. Had some buddies come over and help me push it into the garage so I'm not freezing outside. Anyhow, first thing I did was re-check for continuity at the glow plugs. All are blown. On top of that, four of the ones I replaced...

Thanks Doghead! Tomorrow when it's light I'll keep plugging. First thing I'll do is recheck all the glow plugs. I did just install 5 new ones, so if they're bad something is obviously wrong deeper back. I've read a few post on new glow plugs cooking and a few about the 12V bypass. I'll...

Well....that changes tings.:mrgreen: Ok, on the top port, I have 24V with the truck off. In the 'Run' position, I am getting 0-24V on the bottom port as the relay clicks (normal operation, I believe). So, if the plugs are good and relay is good, do move onto the module next? I have the...

Ok, here's a pic of what I am assuming is the Glow Plug Relay. Doghead, you mention top and bottom studs, but what I am thinking is the relay has the studs next to each other. It is entirely possible I am taking measurments off of the completly wrong part. The TM pic is pretty bare (The tech...

The voltmeter in the truck hasn't worked since I've owned it. Can put a meter directly on a glow plug to see if it's getting voltage?

Also, when I jump the light blue wire from the GP module to ground and put the truck in the start position, the relay DOES NOT click. This is reassuring me that the relay is bad, but the fact that it clicks through when I turn the key with everything connected is making my eyes squint.....

Looks like I have 12v on my GP relay when the truck is off. According to the tech manual, this means it's bad. However, it still clicks when I turn the key to the the plugs cycle. Is this a norman bad condition? Can the relay click and still be bad?

Thanks Original. Tomorrow is voltage check day. I just had time to do what I listed above before it got dark. I'll post what I find in the morn.

Over the past few weeks, my truck has been starting with more and more difficulty. I chalked it up the weather getting colder, but now I can't get it to fire at all. I followed the TM on "Cranks but will not start" and have a few questions. I have half a tank of gas. I did an ohm check and...