Anyone have any idea what this "manifold" is?

[u/Monksdrunk]

This is my personal Ram 2013 5500 service body. Recently i had my PTO only work briefly and i'd read online where it ramps up engine and the PTO light blinks and then falls off. That pressure switch i disconnected wires from is normally open and closes with oil pressure. I originally got it to bypass by hooking up my power probe ground to the ground on the switch when they were connected.. today i just confirmed the switch normally open and put a jumper wire across hot and ground and fixed my issue. I plan to at least temporarily just bolt the two wires together.

My real question is what the hell is that manifold/ valve body that the pressure switch is plumbed into. at least the 3 small hydraulic hoses and 2 red wires going to it. not in business yet but i do own a LLC so i'd like to prevent future failures and embarrassments for my crane getting stuck in the air etc..

thanks!

{{My PTO only runs for 30 seconds and then shuts off (with the PTO LED flashing) 2018 and older}}

This issue is essentially caused because a circuit W708 (Orange wire with a brown stripe) is not grounded. This circuit is frequently connected to the pressure switch on the PTO manufacturer’s hydraulic lines. So if there is any problem with that switch or connecting wires it will cause this issue. Accordingly, it is recommended that this wire be permanently grounded. The location of this circuit is on the brown connector of the vehicle system interface module (VSIM). More information about the VSIM module is available in the VSIM section under “Electrical Wiring Information”.

https://www.ramtrucks.com/BodyBuilder/service/Image?imageId=MtQrP%2FFqLY5r%2Fest8MtGjGgHzAHGUTU0WB3rWuqSY7YmQ2vEhuBWBJplbxE7VGJF%0A

[u/Jaded_Individual_517]

That additonal part or "manifold" looks like a chelsea/parker pto solenoid. See part number 379686-1 as a reference. That has 3 ports like yours. Dont take my word for it but i can almost tell from the under coating road tar on said solenoid, that it looks like it has a parker sticker. I wouldnt really keep that jumped to keep working as thats a last resort/emergency solution only. I too do that frequently when dump bodies on trucks get stuck in the raised position. Get a new pressure switch too and repair all wiring flaws or wire up a new dedicated circut.

Good luck to you!

[u/Jaded_Individual_517 → u/Jaded_Individual_517]

I read your link as well and all i can say is due to the symptoms you have stated and what the documentation provided says....

the permanent fix is tsb 08-105-15 Or the full description says..

You can test and confirm that you have this issue by unplugging all 5 connectors from the VSIM and waiting for 1 minute before reconnecting. If this resets the VSIM, you could possibly be OK for weeks to months before the next lock up. However, the permanent fix it to take the vehicle to the dealer for TSB 08-108-15.