So I bought an MSD Digital window switch for my Zex kit and Im curious as to how I need to wire it and how it actually works. I checked out some wiring diagrams other people used and I cant seem to figure out if it still only works under WOT or just when I reach a certain RPM. I want it to activate at 3000rpm to start but if I have the switch armed and on and Im cruising at highway speeds which will go beyond 3000rpm durinng certain times, would the nitrous activate or does it still need to be at WOT? Thats my main concern... I guess Ill be tapping into the ECU for the RPM signal as I dont know anywhere else to get it from. I also bougth a 30A relay at Radioshack as it seems other people needed to use that as well. I may not need to but I dont know for sure. I really need this hooked up by Friday. Can someone with knowledge on this please help me out?

 

Nevermind on the WOT question. I need to know how to wire this! I have a relay with 4 connectors. Somebody...

 

Give me 2 minutes to find my wire diagram.....................

 

OK here you go:
MSD Electronic Window Switch should have 5 wires on it all you need to use is 4 of them.
The red wire you need to tap it into something for power.
The black wire needs to be tapped into a ground
The white wire needs to go to the green wire on the ECU which is on the first plug from the top.
The yellow wire needs to tap connect to the Zex ground wire on the box. Don't ground the wire it should just connect to the yellow and when the window switch activates at 3000rpm it will ground the system and start spraying. Then it will unground at what ever you set it to

Grey wire is not used.................hope this helps......

Also, it will only work under WOT

 

OMG thank you so much!

 

You got a PM.............

No problem, I love helping out fellow nitrous friends, we are like one SMALL family..........

If you need anything else just pm me..................

 

So it turns out the RPM wire on my ECU was a tiny black one... I messed up a couple green ones in the process and a purple one but I got them wired back together lol. I guess its different for an 06 huh?

 

I tapped the green one for my Apexi SAFC Neo for the RPM and did the same for the window switch....................

Everything works fine....................

 

Yeah I tapped two green ones and I couldnt get an RPM readout from them. So I looked for an ECU diagram and tapped what it said was the RPM wire. Works great!

 

So, everything else worked fine............

Right?????????

Sorry about that man, maybe I wrote down the wrong thing on my diagram..........

 

Yeah everything works great! I reconnected those other wires before I started anything... so not to worry there. Window switch works just like I had hope!