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| | | | Joined: Jan 2006 Posts: 14 Junior Member | | Junior Member Joined: Jan 2006 Posts: 14 | Have a 1949 chevy pickup. when I got it the heater had no switch.There are 3 wires, 1 yellow and 2 orange.If I run a wire to each one they all run the fan, one at a higher speed. What kind of switch and how to hook it up? It is also coverted to 12 volt.
Jim Geurts
| | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Jim G,
Did someone else convert the system to 12 volts? My guess is that the motor was also replaced with a 12 volt version...does it look 'newish'.
A old, stock motor would probably only have one wire coming from the motor...maybe two if one were a external ground. The three wires you have would hint at a newer, two speed motor.
A guess would be that the yellow is ground and that the orange wires would be a lo/hi speed arrangement. If you ground the yellow and momentarily touch each orange to power, does it appear to run at different speeds corresponding to each orange wire. Does it run the same direction using either orange wire.
The simplest switch arrangement if each orange results in a different speed would be some type of single pole-double throw toggle switch. This is all speculation...there are some weird fan motors around and they seem to wired in a non-universal manner. I wouldn't be surprised to find a dual voltage motor for that application.
Stuart | | | | | Joined: Dec 2003 Posts: 2,953 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 2,953 | On my 49 I have two wires. One from the ignition switch to the heater switch and then to the fan motor. The other wire is a ground which is attached to the heater shell. I put an in-line fuse between the ignition switch and the heater switch. The heater switch is basically a rheostat which varies the fan speed. | | |
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