Engine bay, switched 12V

[91r/t]

Well the pink wire does indeed turn on the screen and power the ECU so thats one bit I figured out this morning.

 

[71GTX440]

Could we just run the pink wire to the battery as well with a switch to it to toggle on before/when you also turn the ignition key on? It would double as a kill switch for the car. I would think the amperage draw would be small on that circuit as it is just the trigger wire for the Holley ECU correct? Heavy duty toggle switch under the dash going from the battery through the switch to the unit with a fuse inline and done. Correct me if I am wrong.

Potentially could run it this way. I think I found a super simple solution though.

 

[71GTX440]

For anyone interested and read this far; the brown wire running from the back of the wiper switch into the firewall has constant 12V during IGN2. Tracing the input wire, the blue wire with yellow trace coming into the wiper switch is the input power. Tying in prior to the switch causes no loss of power to the switch or wiper motor

 

[gkent]

So basically any option that only works with the key on would be a good source. But you still have the issue of that short loss of power in the short time between start and run.