Light for Mystery Switch

[dflaugh]

I want to add an LED to my mystery switch.I tried one but had a resistor and messed up signal to the controller.Put just Led, 3.7 volts,was nice and bright while it lasted.Need some help on this one.Thanks everyone.

 

[Bill Stockard]

I want to add an LED to my mystery switch.I tried one but had a resistor and messed up signal to the controller.Put just Led, 3.7 volts,was nice and bright while it lasted.Need some help on this one.Thanks everyone.

I installed a 12-volt pilot light on my formerly owned '97 3500 when I installed the mystery switch. I used a double pole-double throw switch with one side of the double pole switch controlling the torque converter lockup and the other side of the double pole switch controlling the 12-volt pilot light circuit. you could accomplish the same using a LED instead of a 12-volt pilot light. The double pole switch keeps the two circuits separate.

Bill

 

[SnoKing]

To use a LED on a 12v circuit you need a 1000 ohm resistor in series with the LED. SNOKING

 

[dflaugh]

I used a double pole foot switch like the old trucks used for headlight dim/bright,I can install a green LED on circuit not being used as per Bill's suggestion with the resistor as per Snoking.Thanks guys!