Hey guys trying to spice up the interior of my tC with some under dash lighting.

I know, nothing new right? But my idea is different!!!


Basically I would like the underdash 12" LED bars (amber) to fade on and off like the dome lights do when opening the doors. That would give it a really nice effect I'd say.

The only issue is I am not familir with the control mechanism that fades the dome light on and off. Anyone know how to tap into the dome light wiring w/out splicing the leds into the actual dome light? I really dont want to run wires all the way through the pillars and into the dome. Can this signal be somehow tapped into under the dash?

I should really get the technical manual!

Thanks! - BTW this website is awesome!

 

I highly doubt that you can tap into that under the dash.....If I were to take an educated guess....I'd say that the dome light fuse has constant power going to it and the fading mechanism is actually a circut board in the dome light.....plus it would probably mess sumthin up if you tried doing that without the correct modules and lights...

 

if you find what color the dome light wire is, (not the door trigger, which is red/white) please post, id like to wire my alarm to it.

 

the dome light wire is blue(-) on the driver side pillar. just tap on to that with a relay to control your neon such as your underbody.

as for the LEDs fade on and off...leds don't take to much juice so just diode isolate the blue wire and i think you should be fine but use a DMM just to make sure its ok. I'm not really 100% on this so try at your own risk. as for everything I use a relay.

PM scionspecialistvegas he can help you guys more on the relays
check out his sponsored sales
https://www.scionlife.com/forums/viewtopic.php?t=43404

hope this helps,

 

i am not sure this idea will work like that....

you might need to use regular incandescant light bulbs to dimm.

i have to check it out, but i think leds will light up when the voltage is there. you would need to adjust the resistance to make the leds dimm....

 

CRxB.....Whats a DMM?

Hot lava...Good point abou the voltage resistance issue, I guess I'll have to do trial by fire! (not literally I hope lol)

 

Digital Multi-Meter. Got a Fluke 87 in my network test kit along with a Fluke MicroScanner Pro, Great for testing wiring, electrical...etc.

 

i know the under car led kits that dim, have IC's that change the resistance making the light output less.

let me know what you find....

 

Super is right they do dim by resistance...
but i wonder if the board that controls the leds will change the brightness of the leds when different voltage is applied... i'm guessing the resistors on the board now were designed to be used from 11v - 16v, MAYBE if the voltage drops it might dim... I guess it depends on how the board was made...

try it and see what happens...
don't forget to isolate the door lights from the switch/relay that it's hooked it up to now...

 

Thanks for all the help guys! Once I get those bars in I will attempt the install and if all goes well I will post a vid!