725-3163 Ignition Switch

[Ian181]

Originally Posted by R Bedell

Here is the Matrix for the 725-3163 Ignition Switch

This is the only place I've seen the ignition switch shown with the 6th plug for the ground. Can someone please tell me the exact color wires they have running to all the positions on their switch. When I go to hook up my negative cable to the battery my headlights come on immediately, and the ignition switch is in the off position? My wiring on my switch doesn't even configure with the schematic for the 1440, but it is a 1440! The wiring on my "new" ignition switch is:
S plug: red/blk. wires.
R plug: green wires (but mine has no lettering on it).
B plug: red/wht. wires (again mine has no marking on it).
M plug: blue wires.
L plug: yellow wires (mine is marked G)?
The individual black wire goes to the (6th) ground plug.
I only replaced the switch because the ground plug was loose on the old one, but aside from that the old switch and the new one are identical (725-3163). It ran good, aside from an occasional battery light coming on and off when I engaged the PTO for the snow blower, or turned the lights on, which is what prompted me to clean the connections. I also found the fuse holder looked a little melted/smashed, but was still working, so I replaced it. I've checked all the grounds and they tested good, the only thing that seems to be the culprit is the ignition switch. I can only think I must've got two of the wires switched in the plug when I cleaned them, but I definitely can't go by the schematic to see where. If I do that I'll almost be re-wiring the whole switch. Help please! I don't know if this means anything but I have the steering column out of it right now replacing the bearings and installing a thrust bearing mod on it. There's a switch I have unplugged underneath but that shouldn't cause the headlights to come on with the key in the off position.

[R Bedell]

Wire colors are determined by Tractor Model, not by ignition switches.

For the 1440:
B = Battery = BLK
R = Run = RED/WHT
S = Start = RED/BLK
L = Lights = BLU
M = Magneto = YEL
G = Ground - GRN

[Sam Mac]

The low voltage lights on the Cyclops series are a problem. Do yourself a favor and remove the bulb. If you are concerned about the voltage install a voltmeter.

[aagitch]

My alt light briefly lights up sometimes when I engage the pto. Was wondering if that was typical of these cyclops. I can take a pic of my wires for the ignition switch if needed since the 1864 is right here in the garage. Don't know how similar the wiring is to the 1440.

[Ian181]

Thanks. I believe the 1641 and the 1440 are identical, don't know about the 1864.

[Frank1541]

aagitch. The cyclops voltage light is useless. The one on my tractor lights up at random. As Sam Mac said. Put in a voltmeter.

[Ian181]

R Bedell, when I hooked everything up according to the info below I get an open circuit (38 ohms) on the red/wht wire (run) with the key in the off position? Do you have any idea what that signifies?

Originally Posted by R Bedell

Wire colors are determined by Tractor Model, not by ignition switches.

For the 1440:
B = Battery = BLK
R = Run = RED/WHT
S = Start = RED/BLK
L = Lights = BLU
M = Magneto = YEL
G = Ground - GRN

[darkminion_17]

Pictures of a 1440 harness to check your wiring into the plug.

[Ian181]

Thank you, much appreciated. That did the trick!

[Ian181]

Sam Mac, I believe you're right about that battery light, pull it out!