Update...
Last evening, I hooked a hand pump up to the pressure selenoid and it wouldn't open (activate the pump) even with 25psi, which is strange. This morning I installed a new selenoid and it's activating the pump when I generate right at 10psi on my hand pump. I cannot actually hear the pump activating while driving, but there's alot going on quickly at or above 10psi.
I reattached the vacuum line to the selenoid, after my testing and adjustments. I'll have to give it some time to see if it's activating the pump while on the road.
Any tips on where to wire up an LED that I can install in the dash, so that I can monitor actually *when* the pump is activating?
Thanks for the help!