Anyone know how to install a light on the supercharger clutch so from inside I know when it is on


thanks Dennis

 

Should be simple, parallel a 12v lamp on the plug leading to the supercharger. When the solenoid is engaged, the lamp will light up.

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I had done it with a led, which is polarity sensitive. The supercharger magnet leads are accessable , just done leave bare wires !!!!! Woody

 

which wire is the hot and which one is ground


thanks Dennis

 

The red/dark green wire is the ground.

 

Can we just run one wire to the black and pink(+?) of the SC clutch and then ground the light wherever convenient in the area of light placement? Or do we need to tap into both wires feeding the clutch? My vehicle wiring skills are limited and don't want to screw this up. I do plan on soldering and heat shrinking the connection though.

 

when the switch is on the pink and black is hot. When the supercharger is energized the ground is made [ the led is polarity sensitive] so you should be able to find a hot wire close to the dash or just run 2 wires one hot one ground.

 

I'm sorry, but am confused. If you tap into the BK/Pk which becomes hot, wouldn't you then connect the other wire from your light to a ground, and not a "hot wire close to the dash" as you suggest?

 

Simply connect a 2 wire lead across the clutch connector to a LED, observing polarity with maybe a dropping resistor in series.
Run the wire up to the cowl by the driver's windshield and tape the LED to the lower part out of the line of sight.
Bada Bing, Bada Boom.

 

Reviving an old thread here. I'm finally getting around to installing my light. I have a single 3mm 12 volt LED light rated at 12 milliamps, what size resistor would be best to place in series? I assume that the resistor is so the led light will last longer, not be too overly bright?

 

LEDs have little internal resistance. They need a limiting resistor, otherwise they burn up, essentially instantly.
The value of the resistor depends on the current required by the LED, which should be specified by the manufacturer.

This calculator can help.
https://www.pcboard.ca/led-dropping-resistor-calculator
Use "14" for volts and "1.5" for voltage drop across LED (if not specified by the manufacturer), it can be 1.5 to 3.3 but you should be safe to assume 1.5.

If you buy an LED that says "for 12 volt operation" it already has a dropping resistor in it's leads or it's housing.

 

This exactly answers my question; thank you Mark!

 

Great feedback, Mark!

 

a 1000 ohm 1/2 watt resistor will do it easily, a light bulb will be an easier setup as its not polarity sensitive. Woody

 

Thank you, it was you that originally gave me the idea. I went ahead and bought a plug and play green LED that was made to be a dash light and velcro'd it under the hood lip, so I can see it do its thing.