Posted by Janicholson on March 12, 2011 at 13:09:59 from (67.72.98.45):
In Reply to: Re: Light Switch posted by raybay on March 12, 2011 at 09:14:11:
New lights that draw the same current (Watts) as the old lights are no issue. The issue is that the resistor is designed to dim the single filament original lights. All voltage going to the lights when on Dim, as it comes from the factory, goes through that single resistor. If the lights are now drawing more power, the resister gets bright (too bright) and the lights get dimmer than usable. The only way to use the original switch with more powerful lights is to use the switch to power a relay. 12volt relays have three terminals and a ground. one terminal is connected through a circuit breaker to the load side of the amp gauge. the ground is grounded to the metal of the tractor. The control terminal is connected to the light switch terminal that is now connected directly to the front lights. The load terminal of the relay is connected to the new lights. This allows the lights to draw more current without loading the OEM switch. The resistor is just not needed, I would take it out of the system by removing it from the switch all together. If you have a way to make dim lights (double filament bulbs, or automotive headlights), a second relay could be attached as above except connecting its control terminal to the light switch where the dim resistor was attached. The existing rear light will still work with full power at both dim and bright settings. I hope this answers you question. Jim
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