I think I'm going to try a package all of this in a waterproof enclosure box, Most of what I'm seeing is industrial opposed to automotive style
OK, no PCM control.
Factory key on B+ primary circuit to Fore 1, I get prime and cutoff
Factory key on B+ secondary circuit to 8PSI Hobbs switch then to Fore 2, I get cutoff
I could of use the factory secondary relay if I rewired it but as far as changing when the PCM turns it on( grounds) is questionable.
Who's tuning your truck?I'm trying to maintain factory controls but with performance it's a trade off. I get it.
I will probably work with a rewire of the factory low relay. I take no chances with that. I'll try iy with the next SVT I buy!
Also I'm aware you're running the fore setup.I run with the Fore relay box, so the current/amps are there for pumps 1 &2. The Fore cables size are WAY larger than factory wires but 12V 25 amp fuses each pump.
the factory wiring is only to trigger at 6.5 Volts and a 1/4 amp the Fore needs to see. Its a matter of the inertia switch and fuel cut off relay functioning with the Fore stuff.
The after market pressure switch takes the place of the factory low/secondary pump relay and PCM "ground" triggered on/off. I believe you can rewire the low pump relay to trigger the Fore relay box. but Tuner is not sure he can change/increase the PCM secondary on/off value.
I dont want both 450 LPH pumps running non stop.
You're really over complicating something that doesn't need re-engineered.
^^^^^^^^^^^^^^^ Those^^^^^^^^^^^^^^LOL! Dusten is trying to help you, but you rather give your self a Migraine.
I take it from that reply that he has not tuned very many of these vehicles because if he has he would know there is table for that very thing.but Tuner is not sure he can change/increase the PCM secondary on/off value.
I have print,
Both pumps get 12 volts to run not more or less volts, both pumps have simple relays to turn them on and off . Secondary is a GROUND path trigger. Fore needs to see 6.5 volts to trigger it's relay.
You would have to re wire the secondary rely to not ground but send B+ to Fore, thats why its bypassed. It can be rewired to B+. But my tuner doesnt know if he can change the input value in the PCM to 8 PSI on/off
I get it just send 12 volt to both Fore inputs with key on and they run. I'm trying to keep factory control. I don't want both pumps to run on cruise