Posted by Janicholson on March 11, 2011 at 18:16:09 from (64.61.211.185):
In Reply to: Light Switch posted by Raybay on March 11, 2011 at 13:18:36:
The resistor should get hot, but not necessarily red. When new they do smoke at first. The three positions are off, dim lights (through the resistor to the headlights only, full power to rear light) Then full power to both front and rear lights. This switch is designed for 12 volt operation with the low power bulbs that came with the tractor new. If you use any after market lights at all, including brighter bulbs that happen to fit in the sockets, it will over heat the resistor. The method IH (and others) used to dim the lights was to put a resistor in the circuit. This was inexpensive and (In my opinion) worthless as the lights were so dim already that seeing was iffy at night. If you want to make bright light you will need to use 12v relays and connect the switch to relays to reduce the power through the switch. Also remove the resistor, and use a relay on the terminal for the resistor to power smaller lights, or double filament Halogen automotive lights. Short circuits to ground will also make the resistor smoke. Jim
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