jessdabest77 Posted June 16, 2019 Report Share Posted June 16, 2019 There's two cars I'm working on. A 2011 Camry and 2010 VW Passat. Both are getting underbody led lighting and would like to know how to wire them to door trigger and separate toggle switch. That way they come on when you open a door or you can turn them on in the inside whenever you'd like. I know it's possible but vey confused. Any help especially with diagrams would help tremendous thanks Link to comment Share on other sites More sharing options...
bassfiend316 Posted June 16, 2019 Report Share Posted June 16, 2019 https://www.stevemeadedesigns.com/board/topic/211583-dual-power-source-for-led’s-using-relay/ Link to comment Share on other sites More sharing options...
jessdabest77 Posted June 17, 2019 Author Report Share Posted June 17, 2019 Ok thanks I think I got it except what about pin 85 on the relay Link to comment Share on other sites More sharing options...
bassfiend316 Posted June 17, 2019 Report Share Posted June 17, 2019 85 is the power from the toggle switch. Basically you're using the toggle to activate the relay the same way you would if you were just using it to activate the light. You'll have power in to the switch, power out to the relay, and a ground for the switch if it's illuminated. If it doesn't have a light for the switch, you won't have a ground. Link to comment Share on other sites More sharing options...
jessdabest77 Posted June 17, 2019 Author Report Share Posted June 17, 2019 I think I'm starting to get it. I was reading somewhere it can be also done with toggle switch and diode. Link to comment Share on other sites More sharing options...
slowfkncar Posted June 17, 2019 Report Share Posted June 17, 2019 1 diode & spdt relay. No parasitic draw & no feedback with a switch. For negative dome light trigger 30 = 12v output to light 87a = N/A 87 = 12v 85 = 12v 86 = negitive door trigger input & negative switched, diode isolate door trigger wire at relay. Anode side facing relay For positive dome light trigger 30 = 12v output to light 87a = N/A 87 = 12v 85 = ground 86 = positive door trigger input & positive switched, diode isolate door trigger wire at relay. Cathode side facing relay There are other ways to wire it up without a diode, but that depends on how much current your dome light circuit can provide, this is why i didnt show 87a. Link to comment Share on other sites More sharing options...
jessdabest77 Posted June 17, 2019 Author Report Share Posted June 17, 2019 Thanks for all the help. I apologize for the 99 questions. I was also wondering if any led will work or is there a specific brand or type to look for and what size amp diode would I need Link to comment Share on other sites More sharing options...
slowfkncar Posted June 17, 2019 Report Share Posted June 17, 2019 2 hours ago, jessdabest77 said: Thanks for all the help. I apologize for the 99 questions. I was also wondering if any led will work or is there a specific brand or type to look for and what size amp diode would I need For driving a relay, a 1 amp diode will work fine. *Any 12v light will work, up to 30A per relay. Link to comment Share on other sites More sharing options...
jessdabest77 Posted June 17, 2019 Author Report Share Posted June 17, 2019 Ok thanks for all the help Link to comment Share on other sites More sharing options...
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