momentary switch wiring + led switch

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=119999
Printed Date: May 16, 2024 at 12:34 AM

Topic: momentary switch wiring + led switch

Posted By: over5tayer
Subject: momentary switch wiring + led switch
Date Posted: February 09, 2010 at 6:46 AM

I've just finished installing button start in my car - 1 toggle switch turns the accessories on and 1 momentary, 2 prong switch handles the ignition. I recently bought another momentary switch off ebay - when it arrived i realised it had 8 prongs and didnt include any sort of wiring information. How would i go about wiring this? It has an led so i guess 2 prongs are used for powering that?

Also i've installed an LED toggle switch which controls my brake lights. When its on (99.9% of the time) the led on the switch is also on. The switch itself is a simple 3 prong - power, acc, ground. Is there any way (using a relay etc)i could make it so that the LED on the switch only comes on when the swtich is off? Heres the switch

Replies:

Posted By: over5tayer
Date Posted: February 09, 2010 at 6:49 AM

sorry for some reason the links arnt working. Just search for these numbers at ebay:

300283951026 (Momentary switch)

120321630561 (LED toggle switch)

Posted By: KPierson
Date Posted: February 09, 2010 at 9:43 PM

Your switch, according to the Ebay ad (Ebay links are prohibited on this site) states that it is a DPDT switch with illumination - thus 8 wires.

Two are for the illumination and three are for each set of contacts.

You should be able to use an ohm meter and find two sets of pins that read 0 ohms, then flip the switch and find two more sets that read 0ohm. The "common" pin on either side is your common input to your switch and the other two pins associated with the common pin are your NO and NC pins.

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Kevin Pierson

Posted By: over5tayer
Date Posted: February 10, 2010 at 10:58 PM

thanks kevin, got the momentary switch working. Any ideas how i could do the LED thing?

Posted By: KPierson
Date Posted: February 11, 2010 at 5:31 AM

Take the output of the switch and run it to a relay. Connect the NC contacts of the relay to your brake lights.

This way, if the switch is off the light will be off and your brake lights will work.

If the switch is on the light will be on and your brake lights won't work.

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Kevin Pierson