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led triggered by dome light and on/off/on


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jewster 
Member - Posts: 14
Member spacespace
Joined: August 05, 2009
Location: California, United States
Posted: August 05, 2009 at 1:50 PM / IP Logged  
Here is what i want to do:
2008 Nissan Pathfinder:
Switch Position 1(ON): LEDs to come on with dome lights.
Switch Position 2(OFF): LEDs OFF
Switch Position 3(ON): LEDs to come on regardless of dome lights.
Note: The dome trigger is (-) and my switch has its own led that I would like to stay illuminated at all times(unless ign is off ofc)
Thanks for the help cause I am lost. I have tried searching around, but I really never found a concise answer to this.
t&t tech 
Platinum - Posts: 2,608
Platinum spacespace
Joined: October 05, 2008
Location: Trinidad and Tobago
Posted: August 05, 2009 at 8:09 PM / IP Logged  

you would need a relay, a toggle on/off switch and two one amp diodes, do it lke this

the relay-

pin 30 and 86-to twelve volts permanent fused at ten amps

pin 87 to the positive leads of the leds

pin 85 - diode the output of the dome light an the toggle switch into this pin (bands facing away from relay)

the other side off the toggle switch is grounded along with the negative leads of the legs

jewster 
Member - Posts: 14
Member spacespace
Joined: August 05, 2009
Location: California, United States
Posted: August 07, 2009 at 12:15 PM / IP Logged  
awesome thanks...that makes sense now
jewster 
Member - Posts: 14
Member spacespace
Joined: August 05, 2009
Location: California, United States
Posted: December 14, 2009 at 4:35 PM / IP Logged  
Okay its been a while since I posted this thread, but I just got a bunch of stuff to start this out and I actually needed the info for an on/off/on switch since i would like to be able to not have the leds come on at all. Any help with that?
jewster 
Member - Posts: 14
Member spacespace
Joined: August 05, 2009
Location: California, United States
Posted: December 14, 2009 at 5:12 PM / IP Logged  
Would it just be the same except wire the off position to acc+ to illuminate the switch?
t&t tech 
Platinum - Posts: 2,608
Platinum spacespace
Joined: October 05, 2008
Location: Trinidad and Tobago
Posted: December 14, 2009 at 8:04 PM / IP Logged  
You want it so that the led on the toggle switch is off! Assuming here that the led is powering from a twelve volt permanent source, then yes just eliminate this connection and connect this to an ignition or acc wire!
commit your way to jehovah and he will act in your behalf. psalms 37:5
jewster 
Member - Posts: 14
Member spacespace
Joined: August 05, 2009
Location: California, United States
Posted: December 14, 2009 at 10:39 PM / IP Logged  
Okay, please bear with me, and my mspaint skills. (what software do you guys use to create diagrams?) How does this look? Will this accomplish what I am after?
Thanks again.
led triggered by dome light and on/off/on -- posted image.
jewster 
Member - Posts: 14
Member spacespace
Joined: August 05, 2009
Location: California, United States
Posted: December 14, 2009 at 10:44 PM / IP Logged  
Also. Why would I not want the switch led to be illuminated when in the off position? Oh and my leds already have resistors.
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: December 15, 2009 at 12:51 AM / IP Logged  
The complexity is the illuminated switch unless its lamp can be separated to the switch contacts (ie, it is merely connected between IGN & ground).   
The circuit otherwise is almost in parallel to the dome lights.
EG - same "always hot" power to LED+. The switch connects LED- to dome trigger - ie ground via door switches (Pos #1 - on with domes), Pos #2 is open (NC); Pos #3 to ground.
jewster 
Member - Posts: 14
Member spacespace
Joined: August 05, 2009
Location: California, United States
Posted: December 15, 2009 at 10:06 AM / IP Logged  
Okay, my diagram is good then. I should just omit the acc+ connection for pos#2 and not worry about the illuminated switch?
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