Holley Plug And Play Turbo Buick Harness

[sackracing]

 

[sackracing]

 

[chris]

Steve
What are the pink and white wires for?
My harness doesn’t have the fan turn on wire (your last pic), where does that connect into the Holley system?

 

[sackracing]

That probably is the fan turn on

 

[sackracing]

That is an older harness

Pink to switched 12v

White is tach feed

Fan has to be set up as on output, use the I/O plug in engine bay.