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No go on the service brake quick release valve. Swapped it out and it still leaks out the service air gladhand with brakes applied

Look around the drivers side of the trans thats where the pto goes its electric solenoid engaged. Maybe a wire is pinched and shorted somewhere. You could probably just leave it out.

We shall see in the morning. Weather permitting.

I have made some progress. Re-reading the TM it talks about a quick release valve. The only quick release valve that I know is part of the ctis. Which I previously tested by switching to a lower tire pressure setting. But evidently there is also a quick release valve thats part of the service...

I have a M1083 truck with a brake/air issue. Not quite my area of expertise and I could not find my specific issue in the TM troubleshooting. The brakes do function and the truck can be driven, but when I step on the brake pedal, air flows out the front blue service air gladhand at a decent...

I looked. My first gen spare bowl only has 2 wires.

The one with green pcb power panel is an A1 so second gen.

Troubleshoot. The first gen trucks dont have an engine computer.

Some of the earlier style starters have a thermal protection that is known to go bad creating a no start condition. But its very easy to go step by step and diagnose.

Starter, aux starter solenoid, start relay in panel or bad start button. I would start with the relay in the panel you can jump the contacts with the relay out and see what happens. Top to bottom should crank it.

You have to lift the panel. There are screws along the front and back. They are Phillips head. The bolts hold the plastic to its metal frame you have to lift the frame. You can choose a circuit to tap off. Some may already be there and unused on your truck. Don't tap into the trans ecu circuit.

I believe it's just a heater. I think I have an extra complete assembly. I can look Monday.

There is a switched 12v feed at the breaker panel. You can tap off it and add a breaker in one of the blank spots I have the contacts and locks. The main power switch controls several 12v circuits via relay. If you are installing something with higher current drain then you can use the trucks...

Post a pic so I know exactly which one I will see if I have one. The breaker panel on the right dash. Under are wires. You can pick 2 to tap off off that are switched with the dash switch.

I have my truck hooked up with the regulator hot with no issue. You can tap off switched power under the panel if you wanted but it's more work. What air chamber? Maybe your engine fan is stuck on. Low voltage can cause that. Is the heater blower working? Maybe the coolant feed lines are getting...

I have the ctis seals that go on the axle. Good to know you found your problem. I just started getting into another truck working thru a whole set of new issues.

Yup see it now.

There is a neutral safety but the transmission default is to go into neutral. If any wires are not connected or damaged that would prevent start. Do you have correct voltage to the trans ecu and the engine ecu? Low voltage causes a wide array of issues in these trucks. If you have power to both...

Where? I don't see a defrost control. I see a slot on the back. The controls show outside air or recirculate. That has to be the outside air intake though. Maybe you can aim the vents toward the windshield.

I saw those heater/AC boxes I was going to bid on some but they didn't appear to have defrost on them and with 4 seasons in CT I use the defrost on a regular basis. They appear to have a fresh air intake and recirculate. Makes sense if they were designed for an armored vehicle that the windows...