I have an NX EFI kit and I am trying to get my BMN window switch to work.

First of all, everything works correctly w/o the window switch installed. My main power switch is on the hot side of the relay (red wire) and the WOT and Window switches are on the ground side (white wire).

The directions say to unhook the ground wire from the WOT and run that to the purple wire of the BMN switch. Did that. I also hooked up 12v IGN (with the 3A fuse) and the ground to the window switch. I hooked up the tach lead as well...the wire is from the computer to a 'Y' which splits off to the window switch and to my shift light...the shift light works fine so I'm guessing the window switch is also getting the signal.

The BMN switch is set on 4 cyl mode since LS1s are 2 pulses per revolution. The power LED works, the brake switch LED works, but the green LED to tell you when the nitrous is in the window and 'on' does not come on. First gear lock out is off.

HELP!

I've checked all the wires for continuity and have gone over all the connections many times. I dont know what the problem is.

 

Do a search for BMN, then pm or E-mail. BMN guys are very help full and would be able to straighten things out. There is a wiring diagram in the stickies with the BMN WS. It might be able to give you some insight. I do know they wire a little different than the standard type WS.
Robert

 

99sleeper,

did you use the diagram in the link below to wire it up? The NX setup is a little different. This is the easiest way to do it.

https://ls1tech.com/forums/nitrous-oxide/372084-bmn-window-switch-install.html