overheating/fan issues

[Drakec]

I have been having a couple of issues with my fan not kicking in and my coolant bottle blowing off. As its a track car i just want to wire a fan switch in the dash. I know the fan works as if i pull the coolant temp sensor plug off then start the ignition the fan kicks in. I have tried another relay but no change. I have took a couple of pics of the wiring to the bottom of the relay it has two red wires a brown and a pink wire. Just want to know where to splice the wiring in. Its a 172 cup. Thanks

 

[marinemackay2003]

I would just try bridging them all till one turns on the fan then put a switch in that line

 

[Mike@Rentech]

I'm sure there is meant to be 3 small relays on that board. Get another and plug it into the empty space no harm in trying.