so i have this pressure switch


which terminal do i hook up to the 12v ignition and which to the #86 pole on the relay.

 

looks as if the middle is the ground, and the top and bottom are the window, i mean 12 volts in the top and 12 coming out of the bottom

 

bump

 

"NC" is normally closed -- I assume the circuit will disconnect whenever the switch is active. Like an inverted trigger.

"NO" is normally open -- the circuit will probably connect to GND or 12v when the switch is active.

I guess try to wire it up to whatever you want the switch to do

 

Connect 12V positive to the COM connection.

Below the pressure level of the switch that same 12V will be available at the NC connection, and nothing will be availble at the NO connection.

When pressure goes above the trigger level of the switch, that 12V positive will be available at the NO connection, and will no longer be available at the NC connection.

If you want the water to spray when the manifold sees pressure above the trigger level of the switch, connect the switch in the following manner....

Positive supply -> fuse -> COM connection -> NO -> positive of water pump (red prolly) - pump to ground (black prolly).

You'll need to connect a tube between manifold vac/pressure and the switch.

Craig @ TunerToys

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TunerToys &raquo;</TD></TR><TR><TD CLASS="quote">Connect 12V positive to the COM connection.

Below the pressure level of the switch that same 12V will be available at the NC connection, and nothing will be availble at the NO connection.

When pressure goes above the trigger level of the switch, that 12V positive will be available at the NO connection, and will no longer be available at the NC connection.

If you want the water to spray when the manifold sees pressure above the trigger level of the switch, connect the switch in the following manner....

Positive supply -&gt; fuse -&gt; COM connection -&gt; NO -&gt; positive of water pump (red prolly) - pump to ground (black prolly).

You'll need to connect a tube between manifold vac/pressure and the switch.

Craig @ TunerToys</TD></TR></TABLE>

Can the switch withstand the current draw of the pump? What most people use these switches for are pull to ground trigger. I would rather have the switch trigger a relay (wither GND or 12v) instead of running full power through the switch and then to the pump. What's the specs on that switch?

 

here's the specs on the switch http://cgi.ebay.com/ebaymotors...=WDVW

and this is the wi kit i'm trying to replicate http://www.snowperformance.net...n.pdf

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tony the Tiger &raquo;</TD></TR><TR><TD CLASS="quote">

Can the switch withstand the current draw of the pump? What most people use these switches for are pull to ground trigger. I would rather have the switch trigger a relay (wither GND or 12v) instead of running full power through the switch and then to the pump. What's the specs on that switch?</TD></TR></TABLE>

Good call! I wasn't thinkin deep enough into it. A connection description for arelay based circuit, will require a picture!

eBay description rates the switch to 10 amps. AS long as your pump is below that, you should be fine...

 

here's the wiring diagram

i don't have the water solenoid so do i just connect the No3 to the #85 terminal on the relay and thats it?