65 psi pressure switch install/wiring on 02 psd dead head - Ford Powerstroke Diesel Forum
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Old 06-12-2013, 08:39 PM
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65 psi pressure switch install/wiring on 02 psd dead head

Hello, I was hoping for some advise on installing a pressure switch in my 3rd (vacant) port of 3 port valve wired to diesel pump. I bought one of these from McMaster car off the parts list that wvo designs offers but I don't quite understand wiring and install. It has a 1/8" male npt and my ports are 1/2" orb. So would I look for a fitting that was 1/2" orb male to 1/8" npt female, plug in switch and wire to diesel pump? Sorry if I'm way off, can't seem to find info on this and haven't got a solid direction from wvo designs as of yet. Thanks in advance for any help.
Also, I have posted quite a few ?'s here in the last 3 weeks and really appreciate the support I have received. Thanks!!
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Old 06-14-2013, 08:55 AM
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mmmkay,

Not being 100% sure how your system is plumbed or wired there are a bunch of scenarios. But to start the thought process, you should only have to put the PS switch in the fuel supply, I don't understand the 3 port scenario as you describe. I don't have a 3 port valve anywhere in my deadhead system.

When the veg system is on, if pressure drops below 65psi while on veg, it should kick d2 pump on. When the veg system is off, the d2 pump should run regardless of psi at the switch.

How do you have the relay controlling your d2/veg pumps wired? Do you have separate relays for d2 pump and veg pump? Did you use 5 pin relays, i.e is there an 87 and 87a pin?

we be veggin',
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