Join Date: Aug 2009
Location: Rocky Mountains Front Range
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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',
2005 Excursion 6.0l Eddie Bauer, 175k