FlyingCat
Jedi Hopeful
Offline
Please pardon me, but I need to bounce this off somebody else to see if I'm right. I've been trying to figure out the engine wiring on my 1980 Triumph Spitfire (federal) using wiring guides from Canley and Haynes. Right now I'm focusing on the electric radiator fan. I'm pitching the fan that came with the car and replacing it with a Hayden fan – far more efficient, and far less bulky, and it doesn't require a bracket.
The Electrical Radiator Fan Relay seems to control everything, and I'm assuming it's somewhere near the radiator, though not necessarily. There are four male electrical connections on the Electric Radiator Fan Relay. I am assuming there is one connector each for the four following leads, though I wouldn't have a clue which wire goes to which connector. Those four leads are:
1) The Power lead – a purple/green unfused wire that originates from brown wires, which then go to many places, but mainly the ignition starter switch. So when the car is on, the fan has power.
2) The Thermo Switch, which is connected to the top of the Radiator and tells the Fan Relay when to turn on the Radiator Fan.
3) The Electric Radiator Fan. It carries the signal from the switch to the fan.
4) The fourth electrical connection goes to what appears to be a terminal (or a reply coil, whatever that is), where two wires split off (which could be as simple as two wires connected to one female coupling). Those wires are:
a) a white wire that goes to the distributor, as well as various lights.
b) another white wire that goes to the drive resistor, and from the drive resistor, changing colours to white/blue, also to the distributor.
I'm guessing the drive resistor is there to make the fan last longer when it stops and starts. I'm further guessing that it goes through the distributor because it's using that as a gauge on how fast the car is running, or simply lets it know when the car isn't running (but still is on), or allows it to run after the can has been shut off but isn't cool yet. Does anybody know which? Regardless, it explains some of those errant wires.
So here are my other questions:
Is the above correct? If so, which wire goes where on the Fan Relay?
I originally thought I could just avoid a lot of that and have the fan run continuously while the car is running, but now I'm thinking that's not a good idea, namely because there would be no way to keep the fan running if the radiator still needs to be cooled but I'm not wanting to sit out in a parking lot until it is... maybe. Does that sound right?
I appreciate any help I can get figuring this out. Thanks!
The Electrical Radiator Fan Relay seems to control everything, and I'm assuming it's somewhere near the radiator, though not necessarily. There are four male electrical connections on the Electric Radiator Fan Relay. I am assuming there is one connector each for the four following leads, though I wouldn't have a clue which wire goes to which connector. Those four leads are:
1) The Power lead – a purple/green unfused wire that originates from brown wires, which then go to many places, but mainly the ignition starter switch. So when the car is on, the fan has power.
2) The Thermo Switch, which is connected to the top of the Radiator and tells the Fan Relay when to turn on the Radiator Fan.
3) The Electric Radiator Fan. It carries the signal from the switch to the fan.
4) The fourth electrical connection goes to what appears to be a terminal (or a reply coil, whatever that is), where two wires split off (which could be as simple as two wires connected to one female coupling). Those wires are:
a) a white wire that goes to the distributor, as well as various lights.
b) another white wire that goes to the drive resistor, and from the drive resistor, changing colours to white/blue, also to the distributor.
I'm guessing the drive resistor is there to make the fan last longer when it stops and starts. I'm further guessing that it goes through the distributor because it's using that as a gauge on how fast the car is running, or simply lets it know when the car isn't running (but still is on), or allows it to run after the can has been shut off but isn't cool yet. Does anybody know which? Regardless, it explains some of those errant wires.
So here are my other questions:
Is the above correct? If so, which wire goes where on the Fan Relay?
I originally thought I could just avoid a lot of that and have the fan run continuously while the car is running, but now I'm thinking that's not a good idea, namely because there would be no way to keep the fan running if the radiator still needs to be cooled but I'm not wanting to sit out in a parking lot until it is... maybe. Does that sound right?
I appreciate any help I can get figuring this out. Thanks!