the owner of my turbo 2 wired the fan to run constantly *** soon a sthe key is in the on position. where can i wire the fan under the hood so that it will on come on when it is needed?

 

Wire it straight to the battery via a 20A fuse and a relay. Use a thermoswitch to control the relay, and get an ignition signal from any wire in the engine bay that’s live only with the key on. The 6-pin diagnostic plug by the battery is suitable.