Wiring Mallory 685 with pic
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TECH Enthusiast
Joined: Jan 2013
Posts: 686
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From: Thibodaux LA
Wiring Mallory 685 with pic Got the parts in the mail today and took a pic of how its wired up from doing research. Have the connections labeled. I used the MSD harness to make it easier. Its going into a 95 z28 auto the pic is big so you can see the connections
A- MSD harness
B- Harness plug to coil
C- Harness plug to factory harness
D- Red MSD wire harness to red wire mallory box
E- Black MSD wire harness to black wire mallory box
F- White MSD wire harness to green wire mallory box
G- Orange MSD wire harness to yellow wire mallory box
H- Power and ground wires
I- Is where im alittle lost. I think the green and black are not used. The 3 pin plug is to map sensor. The wiring diagram says not supplied with ignition system.
The yellow is the H/S retard (hard start) 12 volt activates. Do i have to wire this in?
Violet is RPM out put. What do i wire this to?
Orange is staging control input 12volt activates. What do i wire this to?
The car has NOS which is why i am getting the box. How does the box know when to retard the timing when i arm the NOS? is there a wire for it or its internal
Thanks
A- MSD harness
B- Harness plug to coil
C- Harness plug to factory harness
D- Red MSD wire harness to red wire mallory box
E- Black MSD wire harness to black wire mallory box
F- White MSD wire harness to green wire mallory box
G- Orange MSD wire harness to yellow wire mallory box
H- Power and ground wires
I- Is where im alittle lost. I think the green and black are not used. The 3 pin plug is to map sensor. The wiring diagram says not supplied with ignition system.
The yellow is the H/S retard (hard start) 12 volt activates. Do i have to wire this in?
Violet is RPM out put. What do i wire this to?
Orange is staging control input 12volt activates. What do i wire this to?
The car has NOS which is why i am getting the box. How does the box know when to retard the timing when i arm the NOS? is there a wire for it or its internal
Thanks
Hopefully you figured it out by now. But in case you haven't or anyone reading this needs help this is how I wired mine up to the 685 box. BTW the orange wire is for the two step.
