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The configuration is pretty simple, it is 3 solenoid valves a 6.5 PSI pressure relief valve and a 0-100PSI pressure sensor. Was just playing with a modular solenoid valve to replace the fan clutch solenoid. I am pretty sure I could put together a CTIS manifold using 3 of the modular valves…...

That’s true for an electrical contact, but for a solenoid valve, closed is closed(no flow) and open is open(full flow)…

Thanks! Someone sent me a great pic, they are right under the PDM boxes accessed from the top of the PDP area…

The one in the bottom of the pic is a bussman 40A circuit breaker like the one in the link below. Not sure what the one in the top is(might be a diode pack), but the wire TL numbers you gave are not associated with the ign relays…...

Passenger side? That was what I suspected, but the person I am helping troubleshoot a problem didn’t see them there…

Where are the 12 and 24v ignition relays K1 and K2 physically located on the A1R?

When you say QR valves what exactly are you referring to? When the air system reaches set pressure the governor/unloader on the compressor unloads the compressor and sends system air pressure down a small control line. That line runs to the purge valve control port on the dryer. If you are not...

Something I have noticed since I removed these valves is that my truck is holding air really well now. I havn’t run it in nearly a week and it is still setting over 90PSI as of this morning… I suspect this valve was leaking air back into the park air line…

Could be, also could be a bad ground power or pressure sensor or wet tank sw. what are the indicator lights doing?

Unplug your CTIS controller and see if that stops it. You can also turn on the fan fording sw to see if that stops it. If it is cycling regularly it is probably the CTIS… If CTIS STOPS IT, just leave it unplugged and check your tire pressures and drive home. If the fan sw stops it remove I...

Yea there wasn't any option to post in the TM section when I looked to do this a while back, so I assume it will take an admin to allow it…

You would have to do that yes as it would deliver park air to that line when you released the park brakes. In my case I had already removed that line when I deleted the front gladhands. That line runs up to behind the drivers side grill to the output of the top 2way check valve. There is a...

Message me with an email and I can send you a copy of just the schematic section .PDF clipped out of the main service manuals…

Yep, that s it…

The one off the secondary tank is a 2way check with that remote control valve in your pic attached. It uses park air to control air supply to the manifold and AOP. Keeps someone from raising the cab once the park brakes are released. The 2way it is attached to provides pri or sec air. The...

Yep, with the center terminal on the key switch being the start contacts, that would work…

The Baldwin alternate filter is the BF1222. Yes it deletes the plastic bowl and heater and has it’s own drain valve. Have used them for years at work… NO, you should not get fuel out of the drain port on the bottom of the filter when priming. Sounds like your drain fitting is loose or not...

What Geo said. Getting turned down for failing to follow instructions during approval and not accepting members are two very different things…

The FB group is accepting members, but it is not just click and go, there is a process(read the instructions carefully) as we screen every applicant to try and keep the spammers, scammers and bots at bay…. I wouldn’t short you guys, I posted the same pics here that I posted there and there are...

Not quite sure what you are looking for, it wasn’t much cutting and a dremel with a fiber cutoff wheel did it easilly. there were 2 rivets/spot-welds to drill out on the inner door skin(circled in the first pic). the first two pics on the initial post in this thread pretty much shows a before...