One of my friends likes to use SM stuff in his cars. He likes the product.
The schematics are geared more towards a car with factory wiring using a key to start them. Have to make some tweaks with aftermarket wiring systems.
Dedicated race car? Wire the CD relay to the downstream side of the kill switch. The line to the alt is dead when the master kill is off.
If you are using a factory column key to start, there is a second schematic in the thread with the cd relay trigger going to a keyed source. Set it up so when the key is in acc or run position the line to the CD relay trigger is hot. You'd have to leave the key in that position to have your fan running with engine off.
Or run the power for the fans from kill switch downstream side. You need to figure out how to get the fan relay 30 terminal hot at all times.
I'd probably pull power from the kill switch downstream side for your fan.
