Ignition Switch - For Radiator Fan Relay
Thread Starter
Instructor
Joined: Jul 2013
Posts: 119
Likes: 2
From: San Francisco California
Ignition Switch - For Radiator Fan Relay
I'm having trouble locating in the fuse box on 76 where to put the ignition switched on wiring to the relay for a new dual radiator fan? I have used one already for the electronic fuel pump. Tried to combine the aftermarket lights with this ignition but it blew the fuse.
Where can I find another ignition line to connect the radiator fans?
Where can I find another ignition line to connect the radiator fans?
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
You should use the fuse panel lug where you have the pump connected to control a relay. Then use the relay (or relays-even better) to power the fans and the pump.
Use the existing wire that feeds the pump to connect to the relay(s) coil and ground the other coil lead. Run a large gauge wire from the alternator to one side of the relay's contacts, and run another large wire from the other contact to the fan and pump. When the ignition switch goes hot, the relay's contacts will close and complete the circuit to the fan and pump.
Use the existing wire that feeds the pump to connect to the relay(s) coil and ground the other coil lead. Run a large gauge wire from the alternator to one side of the relay's contacts, and run another large wire from the other contact to the fan and pump. When the ignition switch goes hot, the relay's contacts will close and complete the circuit to the fan and pump.
Last edited by jnb5101; Dec 22, 2016 at 02:20 PM.
Thread Starter
Instructor
Joined: Jul 2013
Posts: 119
Likes: 2
From: San Francisco California
You should use the fuse panel lug where you have the pump connected to control a relay. Then use the relay (or relays-even better) to power the fans and the pump.
Use the existing wire that feeds the pump to connect to the relay(s) coil and ground the other coil lead. Run a large gauge wire from the alternator to one side of the relay's contacts, and run another large wire from the other contact to the fan and pump. When the ignition switch goes hot, the relay's contacts will close and complete the circuit to the fan and pump.
Use the existing wire that feeds the pump to connect to the relay(s) coil and ground the other coil lead. Run a large gauge wire from the alternator to one side of the relay's contacts, and run another large wire from the other contact to the fan and pump. When the ignition switch goes hot, the relay's contacts will close and complete the circuit to the fan and pump.
Genious! When you describe instructions out like that it now makes a lot of sense. I realize now that the pump didn't have a relay so when adding additional components it would trip the fuse. With two relays the ignition switch will just close each circuit for the power to each.
Thanks for the input.
