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Discussion Starter #1
Ok, I did a search, but have not yet found it. I have added three switches, no problem, nice and easy. I then grabbed a jump off of the dimmer circuit and, while it works, it is opposite the dash lights. i.e. dash lights bright, new switch dim, and vice versa.

What stupid trick am I missing (and yes, I did try switching poles before posting. With poles switched, no lights on new switches)


thanks in advance!!
 

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First guess is that it has to do with what wires you're connecting to.

I might be able to help but you'll need to tell me how you wired it up... a diagram would work wonders here.
 

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Discussion Starter #3
Hey Raine

Let me se if I can better describe it. On my truck, a 2016 SV, I installed 3 switched to the right of the mirror cluster, which include the Mirror control, Hill Descent and Cargo Lamp Switch. The Cargo Lamp Switch is something like this:

1 2
3 4
5 6

4&6 have no connections, 1&2 appear to be switched (I know, this is weird and attribute it to the CB in the switch), 5 is black with a white trace. Using a 12 volt light grounded to the frame, I found 3 to be the LED control +. I therefore tapped into 3 for LED+, and 5 for LED-.

As stated, everything works except in reverse. With the Dimmer at 3 or 4, everything is perfect, but I would really like to synch them up!!
 

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Not helping much there LOL

I'll have to look and see if I saved my wiring notes when I installed my Xterra switch, that dims like OEM but maybe I can see what wires I used. I'll get back to you later tonight when I can look for the notes at home.
 

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Discussion Starter #5
It looks like I found it in the shop manual. Probably should have used 3 and 2 instead of 3 and 5. I will try that tomorrow instead
 

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I ran into this issue with my interior led swap. The way certain dimmer wires work in the cab is you'll get power off of the ground based on the dim...so the power is always full power. So, hook up the 12 volt normally and the ground to the dimmer. When it's turned down (fully dimmed) the ground will have full power, as you turn up the lights, the wire becomes less charged until at full brightness there's no power and it's full ground. If that makes sense.

TL;DR: Hook the power to your lights to a constant 12v, and hook your ground to the dimmer.

Reread your post, you may have issues using this method on switches, so you may have to find another source for your dim.
 

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I ran into this issue with my interior led swap. The way certain dimmer wires work in the cab is you'll get power off of the ground based on the dim...so the power is always full power. So, hook up the 12 volt normally and the ground to the dimmer. When it's turned down (fully dimmed) the ground will have full power, as you turn up the lights, the wire becomes less charged until at full brightness there's no power and it's full ground. If that makes sense.

TL;DR: Hook the power to your lights to a constant 12v, and hook your ground to the dimmer.

Reread your post, you may have issues using this method on switches, so you may have to find another source for your dim.
I thought about the 12v+/ Dimmer+ combo too, but with the mindset of LEDs - not in a switch-type application. BTW @rdbradish sorry dude, no go on the diagram, I couldn't find my old notes :frown:
 
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