This on-off-on rocker switch controls the radiator- and trans-cooler fans, as well as the Meziere water pump. In one "on" position, the fans and water pump will run at the same time. The other "on" position is dedicated to the water pump only, so we plugged a Painless racing diode (PN 80111) into the switch to make this type of isolation possible. The diode works as a check valve of sorts; it lets power flow only in one direction. We're using another rocker-switch/diode combination to run the coupe's parking lamps separately or together with the headlights.
We took a note from many of the NMRA-race Mustangs we've seen and mounted two Moroso momentary switches (PN 74122) in the left spoke of Grant Products' Evolution GT steering wheel (PN 1434). The buttons are for our burnouts and launch at the dragstrip. The top switch controls the Performance Automatic transbrake, and the button below is for activating the Moroso antiroll solenoid.
We used this simple four-pin plug from a trailer-wiring kit to channel electric signals from the transbrake and antiroll control unit to the Moroso momentary switches mounted in the steering wheel.
The electronic speedometer requires Auto Meter's 16-pulse-per-revolution Hall Effect sending unit (PN 5292). The pass-through drive for cruise control is blocked off (red cap) since our coupe doesn't have that luxury.
Although the coupe's electrical system is tied into several relays, we still use fuses. This ATC Fused Power Distributor by Scosche (PN P48ATCFDI) is a platinum-plated hub for a four-gauge power feed that breaks out into four fused, eight-gauge leads for the fuel pump and other accessories.
As we mentioned earlier, every stitch of factory wire was removed from the coupe at the onset of the project. With that being the case, new harnesses for the front and rear lightworks had to be created, although we saved and reused all the bulb sockets from the OEM wiring. Bobby Lourenco helped us in that department, using Scosche's trick EFX twisted, nine-wire cable. The cable consists of nine color-coded, 18-gauge wires wrapped in a clear jacket, and it's perfect for making this type of harness.