2012 express hid swap

I was looking on the retro shop site and could use some help figuring out what I need. I had dual headlights but swapped to quads. I'm looking for a set of super white hids, not sure what bulbs to order. Also the switch back led turn signal/running light. Could you list the kit or harnesses needed for this? The more the plug and play the better.


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Here's what you need:

HIDs - https://shop.retroshop.us/ProductDetails.asp?ProductCode=4G.HIDs
Diode - https://shop.retroshop.us/ProductDetails.asp?ProductCode=Diode
Switchbacks - https://shop.retroshop.us/ProductDetails.asp?ProductCode=3157SB2

diode is because you came from duals. It will keep the lows on with the high beams (as your truck is programmed to turn them off)

Man, I'm so confused. What's the difference in the canbus adapter, and the mopar spec relayed harness? Does one of these make it where I don't have to run grounds, 12v to the battery, and all that other crazy ****?

Great question. Going through same thing with my 2012 with quads as well. Do i need the relay harness if i get the canbus adapter? I do not want the bulb out warning.

greychevy said:

Man, I'm so confused. What's the difference in the canbus adapter, and the mopar spec relayed harness? Does one of these make it where I don't have to run grounds, 12v to the battery, and all that other crazy ****?

Click to expand...

The canbus adapters are plug and play no crazy wiring


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I have quads now so I need to order 2 sets of these with canbus adaptors, one for low beams and one for high beams correct?
09-12 Dodge Ram HIDs - for "Quad" lights

And one of these with canbus adaptor for the fogs...what does the added capacitor for $12 do?
2009+ Dodge Ram HIDs - for Fog lights

So.....lets break this down.

Canbus adapters - EASY install. They go between the OEM plug (where your halogen bulb used to be) and your ballast. Thats it.....done.

Full mopar harness - the old standard, dual relay harness, capacitor, resistors (13+), run to the battery, couple grounds, etc........

Both do the same thing. Canbus adapters are much easier to install, and they are cheaper.

To do both the lows and highs, you need 2 kits. H11 and 9005 (on your truck Ethan). As for the fogs, the capacitor is only needed with the full harness, on 13+ models.

I'm guessing.........you are reading my site from a phone? Each option has a "?" next to it, opens a new window to go into detail on the options. Damn phones don't show it......

Ok, gotcha. So the canbus adapters are something newer and the other harness is kind of the old way of doing it? So I don't need the fog light capacitor for my truck? All of that with lows/highs/fogs will be plug n play but the switchbacks need to be spliced in correct?

I appreciate you clearing everything up!

Yep, looking at it from my phone lol

Oh, and last thing, what color temp are the switchbacks and do I need to order a quantity of 2 or 1 for those as well as the diodes?

greychevy said:

Ok, gotcha. So the canbus adapters are something newer and the other harness is kind of the old way of doing it? So I don't need the fog light capacitor for my truck? All of that with lows/highs/fogs will be plug n play but the switchbacks need to be spliced in correct?

I appreciate you clearing everything up!

Yep, looking at it from my phone lol

Click to expand...

Correct. But.......just a note, at this exact moment, I'm not selling switchbacks. I decided to stop selling the ones I had, and am going to be carrying the ones from TRS or Diode Dynamics soon.....haven't decided which ones, I want to get a set of both in and make up my mind!

greychevy said:

Oh, and last thing, what color temp are the switchbacks and do I need to order a quantity of 2 or 1 for those as well as the diodes?

Click to expand...

See above......for now.......no bueno from me.

Thanks man! How many of the diodes for the quad swap do I need? Two at $25 a piece?