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I am making mine into an RV, it will not be able to really tow something with air brakes after that anyway. it cleans up the plumbing and simplifies the air system. Just took the pintle hitch off last week:)

Ok, they must have sampled primary air from some other location back there. You should be able to see which port is which input in the video. Unfortunately I am away from home so I cannot look at my old valve to confirm which input is which. Like in my configuration, you just need to look and...

Well follow the glad-hand lines they should connect directly to it…

Ok, so is your dash voltmeter no longer dropping to zero? Because there is nothing the alternator can do online, offline, tripped off on overvoltage that should be able to drop the dash voltmeter to zero. The worst you should see is a drop from 13.6/27.7(alt 14.1/28.2 minus diode drop) to...

yea there are differences. Does yours have the same type air brake protection valve?

Yea it could be an out of round issue as much as an out of balance issue.

I do not think the idiot light issue is a transistor. Because of the way the lights are activated, some by a path to ground, and some by a supplied voltage, The lamp test circuit on the A1 panel is divided into two parts. One part that receives a ground to activate and one part that receives...

Yea if you are going to run any of them, I would put the 2017 spare on the front and put a new tire on the other front…

Uuuh you cannot make the front glad-hands supply air:) they are “innies” only… i ran my plasma cutter off of the rear emer glad-hand, worked great:)

The dump valves, when dumping tire air out the vent also feed back a little air toward the PCU. If you close control and pressurized the system, then started a deflate by jumping to the deflate pin and then disconnected that, the dump valves will continue to vent, but the pressure in the now...

If loosening that line from the PCU cover/case to the floors stopped the tire deflate, then that vent line to the floor is clogged… that vent must be unobstructed to atmosphere. The gentleman I helped a few days ago has an Acella, with a deep water fording package. they connected the lower...

Ok, i just helped someone with this same issue, the system deflated all the tires, out in the middle of nowhere… it was a clogged vent… like I described in the deflate cycle, control seals the PCU, then supply pressurizes it, then deflate connects the PCU to a 6.5PSI relief that drops the PCU...

Yea, that was a good one.

@Freedom Land Clearing Here are the pins in the controller to remote control/test the PCU and look for leaks Using a pair of jumpers.

If I worked on them everyday, having the interface would be handy, but for a basic DIY troubleshoot, it is just as easy to jump the pins to control the PCU and test valve function and pressurize the system to look for leaks. Leaks are the usual issue with CTIs anyway… You can probe the sensor...

Well it wasnt wrong, you did indeed have a issue with the wet tank switch circuit, not enough airpressure to close it:) That has been a fairly common CTIS issue, low governor setpoint... i dont recall if it causes 5 flash though, did yours?

different harnesses in different vehicles has been documented. I think Sean even covered it in a video. The A1 wiring diagram shows this with 3 power inputs, an some being listed as "optional" which indicates some sort of option:) at any rate his appears to be configured at least like the A0...

Ok, now I am tracking. You can control the 3 solenoid valves and the pcu function with a pair of jumper wires at the controller connector. Pin H should have 24V with the switch on. Pin R feeds the control solenoid. Pin B feeds the air supply solenoid. Pin C feeds the deflate solenoid...

So when you say no bursts of air at port "C", What exactly are you identifying as port C? The port on the side of the plastic cover?

I was mistaken. L is not listed on any documentation I have. H, M, Z are the indicated power inputs, shown in the manuals. Those 3 pins would give you 7 possible configurations to control programming. It shows H and Z connected on the 1078A0 manual.