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Looks like your relay is showing the correct voltages for not glowing the plugs (GP-card idle). If you short the blue control terminal to ground you should hear a click, and your orange load terminal should show the same voltage as your red load terminal. Once you've verified that and your...

Welcome from California, and nice work [thumbzup]

Note that this is only true if the glow plugs are loading down the battery (i.e., they are not already bad) - just the relay itself isn't enough to make the voltmeter or any lights change in appearance. The multimeter gives you a window into a balanced load - if the load is unbalanced it'll...

Yes, or if you have good ears the click of the relay (my ears suck, but there is still a significant "clunk" every time that thing turns on and off...). I edited my post before you quoted it and we rolled onto the next page - worth a read...

Those (AC60G) and the Bosch Duraterm Inconel 601 parts. Both are self regulating and are less likely to swell (Bosch the least likely due to the shell alloy). Again: The wait light and glow plug relay are not electrically connected!!! Just because the wait light went out doesn't mean it...

The sense relay is illustrated in the standby generator. You can emulate this with a standard 240V-coil DPDT socket relay and socket-base. With a DPDT, you can use one isolated switch side for the load center control, and the other to request the generator start (keeping your 12V and 24V...

Trucks are getting clamped down on the idling. Truck stops are beginning to be equipped with either shore power or the new "Idle air" shore power and HVAC system. https://www.youtube.com/watch?v=TEOTqxokLt4 Those who still wish to be the masters of their domain are putting in smaller APUs to...

Not very, with no load, it won't keep the cylinders hot - cool cylinders lead to incomplete burn and "washdown" where unburned fuel with a solvent characteristic will clean the lubrication oil from the cylinder walls below the rings. You would see galling/scoring of the cylinder walls after...

The wait light duration and separately the glow time (pre-glow, after-glow) depends on the ambient temperatures (most accurately the ambient temperature's effect on the temperature of the block/heads). Yes the voltage supplied to the glow relay will drop to around 11.5-12.5V with correctly...

As for the Voltage converter idea - a diesel engine on a HMMWV will pull about 800CCA with 24V and about 950-1100CCA with 12V. A step-down converter (24V batteries, 12V load) would have to support that load directly (you're looking at a current output level that is just not "cheap"). If you...

The controller should be isolated from 24V by the GP relay. The control lugs should have about 12V when the ignition is on and the relay goes "click" - in general if the controller is turning on the wait light and the relay goes click, I'd suspect that portion of your glow systems is running...

I'll take a moment to point out that if you put an industry standard slave port on a vehicle, anyone other than you who plugs into it is going to expect it to work the way the industry standard suggests (read this thread). I say this because if you're putting a 24V NATO plug on a truck that is...

Sorry - mention of the Wellmans made it sound like you had 6 AC13s that were stuck and burned, and two Wellmans that came out and worked...

If all of the glow plugs were not type/brand matched that's probably what did the others in. They all need to have the same electrical characteristics or the ones with the lowest resistance will burn the hottest. Do you know what model the Wellmans were?

So you do have ballast resistors if you see 24V unswitched at the solenoid. Well 24V at the switched side (glow plug side) of the glow plug relay tells me you may not have any functioning glow plugs any more. That would make it a bear to start. I did a post on what you would see with a...

Not so much ballast resistors I worry about as fusible links. if you keep the resistors clean there's really nothing to catch fire (unless you like to keep your engine compartment clean and shiny with a judicious application of WD-40 or 15W40).

Yup - when they fail they stop heating, sometimes they fail swollen and need to be removed with some extra grunt work, sometimes the tips break off and fall in the cylinders. Make sure you check the resistors before putting them back in a circuit if they were removed by a previous owner -...

What they and just about every other manufacturer did in the late '80s early '90s is move to a serpentine belt. 2cents

Epoxy, urethane is a pretty solid system. Again, do a test on another piece to see if you get a good bond before kicking into the whole truck, and clean, clean, clean :beer:

And reply with what voltage you see on the "always hot" side when the key is off.... The ballast resistors of a 24V glow system are located in a bracket on the firewall directly behind the air filter housing: If those are missing, and you're measuring 12V at the relay, the resistors have been...