I'm running an EFI Live COS 5 to pull timing out of my timing table when a ground signal is sent to the pcm. What I'm wanting to do is some how when my nitrous switch is activated it sends a (+)positive signal to a relay and then the relay will send a (-)negative signal to my pcm. That way I dont have to run another switch just to run to the pcm.

 

Did you lose my number?

 

85 - nitrous switch
86 - ground
30 - ground
87 - pcm

Remember a relay is just an automatic switch...or a switch switching another switch. When 85-86 closes, it closes 30-87.

 

why not just use the ground to turn on the relay for your relay nitrous instead of a positive signal. This way just use the same ground to send to the pcm. No need for another relay.

 

a 1000 ways to do it, Atomic's is simpler for sure. Most guts use the relay to give the solenoid a positive, that why I sketched keeping the positive on the 30/87.