having some problems wiring up switches to use for high/low boost, one for launch control, and one for datalogging. i got on ffsquad and found the wire locations i wanted to use(A/C signal, P/S signal, and Brake switch) since my car is obd2a those locations should be C5, C16, and D5. i cut the wires and ran from the ECU to the switch, and then the other location on the switch to a ground. I went to check it today to verify it was working and when datalogging it shows all 3 of them on all the time, no matter which way the switch is flipped. am i doing something wrong here? the only other thing i can think of is my s300 is one with the obd2a adapter on it from hondata, but that shouldnt make any difference as i would still need to use the obd2a pinouts since thats what my chassis. any insight is appreciated! i am also searching right now to hopefully figure out my mistake(s). thanks

 

Do you have them all grounded at the same point?

Disconnect the ground, and see if they are all still on...

 

no they are not all grounded at the same point. disconnected the grounds and it was still showing up as on.

 

are you pinning in on the harness side of your jumper harness or on the ECU side? I'd do it directly at the ECU if you can.

 

its not a jumper harness, its built on by hondata. got two working thats good enough for now. need to get it tuned and i will figure out the switch i wanted to use for datalogging later

 

Would only be fair to share what you did to get 2 switches working...