I'd wire it to a relay and have the ECU ground it to turn it on bad on temp, rpm, whatever you like, but then also have a manual override switch that will pull the relay to ground to run the pump with the engine off.

Or this:
Originally Posted By TRENDZ
Since you have the ability, I suggest you drive it with the ECU in pwm mode. This way, you can always have some flow without temp surge.

Last edited by OUTLAWD; 04/10/18 12:47 PM.
Faster, Faster until the thrill of speed overcomes the fear of death...

71 Swinger - slowly collecting dust/parts
66 Belv. II - just a streetcar
88 Mustang - turbo LS beater