Radiator Fan Temp Switch Wiring Diagram. A northern radiator fan relay kit can be installed for any single or dual fan application up to 40 amp max combined to protect the vehicle wiring and electronics. Joined may 29 2005.
Also make sure if fan is behind radiator that it is pulling air. The motors operate in series. The chart below provides several problem cause and.
Apr 13 2.
Remove the electrical connector from the cooling fan thermo switch and apply a fused jumper wire between terminals number 1 and number 2 with the ignition switch in the on position with the engine not running. 87 power from battery use an 8 gauge wire 30 connect to positive fan wire use 8 gauge wire 86 connect either wire from temp sending unit 85 connect either wire from temp sending unit then start your car and watch to see that fan comes on around 185 degrees. Youll see how the thermal fan switch passes the entire cooling fan electrical current when its thermally sensitive contacts are closed. Also make sure if fan is behind radiator that it is pulling air.