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That can’t happen unless your tires are over ~85 PSI or you are drawing CTIS air from somewhere else. CTIS(and the fan) pulls air from the protection valve and it wont let air out of the wet tank unless the tank pressure is over 85PSI…

Load and battery control DEVICE… No balancing whatsoever… it is a Polarity Protection Device(PPD) like used on the A0 trucks, with 2 added circuits. One circuit monitors alternator RPM(AC signal from reg) and 28v output. If the alt goes over 1500RPM but not over 20.5, it sends a signal to...

Yep, you should be able to see it come and go in device manager when you plug it in and unplug it, and what com port it is calling itself, so you can select that com port in the app if necessary.

Load battery charge dissconnect i think... or is it control disconnect? Its a polarity protection devjce with a very small pea brain and a large capacitor bank to catch the inevitable voltage spike when you disconnect the load from an overloaded generator...

well you said after it burps a time o two, it wont have enough fluid to raise the cab again right? Since the reservoir is at least 5oz smaller than what the cylinder and latch require, I suspect it is ingesting some air very near the top where you don't need much force anyway as you empty the...

OK, that device you pictured is the remote battery disconnect relay module. it is controlled by the LBCD, or a manual switch below the drivers dash(red guard switch cover). The LBCD monitors the alternator output and disconnects failed batteries from the alternator if the alt appears...

You can add more storage… remove your vented plug and install a hose barb. connect a hose and run that to the bottom of a second small tank/container. You could form one from pipe and fittings, you only need a few oz, and re-install that vent plug on top of the added tank/reservoir. This will...

Voltage regulator is solid state, so what exactly was clicking? Its a 2008, does it have a green circuit board type power panel, or does it have 4 PDM boxes? both A1s are wired the same IRT the lighting, battery 12 to CB70 to pin F on PX15 of the lightswitch. When EXACTLY does CB70 pop?

Well that reservoir isn’t large enough to take the 24+ oz from the cylinder base(and that returning from the latch cylinder), and by pumping when lowering, you are using the rod end of the cylinder as aux storage…

What Geo said. It is really only appropriate to charge with 24 when that is all that is typically being drawn from the batts(discharged equally)… a small balancer really should be used on these trucks when charging with straight 24…

The A1 still uses a high coolant temp switch, S26. Probably in the thermostat housing right front of the cylinder head. Fan control comes from the ECU…

and with the AOP lines capped, and it the only pump in he system, it would have to be vented... back to the basic premise, this system takes X amount of fluid(the number is in my notes at home) to lift the cab. what is the volume of that pump? It takes 24oz to lift the cab, with only a small...

the cab latch is never really under vacuum... There should be no possibility of overflow on the hand pump as it has no vent to overflow as built to this diagram. it has a plug9shown on diagram) The system vent is in the air-op pump reservoir... So when fluid returns, it should flow to the...

In the end, if you send 10oz to the cylinder to lift the cab, you should get that same 10oz back. The little bit of fluid you send to the rod end to get back over the balance point when lowering should be forced back on the next raise. The checkvalves should be of no consequence if the lines to...

the hand pump is not supposed to be vented on the OEM system, by design it must be completely sealed with a plug and the vent is at the Air-op pump... you may need to do some plumbing alterations as I do not believe the return side is able to draw fluid from the hand pump reservoir on the OEM...

yep, ECU controlled on an A1. 205 and 230 are the fan and over-temp light switch points on the A0, not sure what levels the A1 ECU are set for. Cant recall if the over-temp light is backed up with a switch on the A1 thermostat housing, but I am thinking it might be. I will have to look it up...

That was the point of the question, a switch that closes at 120 and opens at 90 is not all that easy to find, and the original CTIS wet tank switches are obnoxiously expensive. how hard would it be to invert that logic, as a close at 90, open at 120 air compressor control switch is a very...

It should be a factor of how often you use the brakes. If you start the truck, it should fill and purge once, the not again until you use the brakes enough to drop the wet tank pressure low enough to engage the compressor(thats where it senses pressure). how long does your truck hold air when...

You shared your code with me once upon a time and sadly I don’t remember the specifics of your programming. I have 2 questions after helping a few people resolve ctis issues. 1. Are you using the wet tank pressure switch input? 2. How hard would it be to invert its logic input to your...

Where is your air feed from? Is the air feed between manifold or air filter, and the compressor clear and unkinked/distorted? restrictions there can cause excessive vacuum while operating and pull more oil past the rings… a little oil is normal, but if you have more than the normal leakage...