My wife took this to make a Costco run last Saturday. I ended up running down after she called because it wouldn't start. Looks like the glow plug controller card is acting up and glow plugs are not functioning properly, if at all. I was able to get it going with a shot of starting fluid, swapped vehicles with her, and ran a couple errands on the way home. It starts fine while warm.
I see it's still 24V starting. Quite a system, with the dual12V alternators!
My '83 works great. It has for the 15 yrs I've owned my blazer. Did glow plugs a few back. If I had to change it I'd do a 7.3L powerstroke relay with a manual button.
The M1009 system uses a control card under the dash with a coolant temp sensor to control glue plug cycles based on engine temp. It is likely the predecessor to the 93 controller you like. In my case the $10 temp sensor appears to be the issue and I picked up a new one.
Someone else had already bypassed the resistor and rewired the glow plugs to the 12V bus so I don't expect and cascade glue plug failures.
No notable exhaust fumes. I'll be checking everything over once I get it back into the shop this weekend.The front battery is charged by the drivers alternator. Check the ground wire from the alternator to the intake manifold. One of mine had that wire corrode over at the intake and stopped charging. All the rest of the times though it has been a bad alternator.
I haven't driven any of mine with the lid off. Is there any exhaust back flow like happens when you drive with the rear window down?