I thank you for all your help so far. I am sorry for being so dense, but I still dont understand the wiring to the microsquirt itself. I understand the usage of resistors at different ohms to divide the supply voltage to give different voltages based on which switch is being pushed Up, Down, or Horn. That makes total sense to me, that you would need push each switch individually to get the voltage going to the microsquirt and input that into the Paddle Shifter entry screen in Turnerstudio.
Reading more on the megashift manual sense it has more info then transmission control manual does. It recommends to use a 5V supply as it will be more stable voltage supply.
Below I am still confused:
1. 5V Vref from microsquirt - Which wire is that? Everyone just says to just use it from the microsquirt, but Im not see which wire that is
2. If I cut the existing horn wire in half
+ Half that goes up the steering column goes to the 5V Vref on the microsquirt
+ Other half that goes to the horn goes to an output on the microsquirt (if you can tell me which pin that would be awesome)
@a91what