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Discussion Starter #1 (Edited)
Open the hood and locate the abs controller harness, it’s near the driver side firewall. The harness itself has one latch that has to be pulled to release the harness. Be careful with it the tracks get full of dirt and dust and don’t like to slide easily (at least on an 06). With that disconnected use a small pair of scissors or a knife to cut away at the wrapping on the wire bundle but make sure not to knick any of the wires.


Locate the sky blue wire with the silver dash marks.



I made sure I had sufficient slack to attach connectors and then snipped the wire, reconnected the harness and turned the truck on to test. All of the right dash lights were on so went back and connected a wire to each end of the wire I cut. Then I ran those wires back through the firewall and to my relay. The wire end going into the abs brain goes on connector 87a and the end coming from the truck goes to connector 30. The way it works is you flip the rocker switch, it sends power to the relay and connector 30 is switched to connector 87. Given we don’t connect anything to 87 the signal becomes a dead end. Make sure you secure all of the wires you ran and re-wrap the abs wiring harness so you keep everything protected. I used some weatherproof splicing tape I bought at Ace Hardware:



 

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Nice, I need to do this to my 2006 6m soon! Couldn't you just run the two wires you added to the blue with trace to a switch in the cab instead of a relay? Granted with a relay you only have to run one hot through the firewall to trip the relay, but then you need to have a relay...

I'm thinking you went more complicated in order to have a lighted switch for the abs.

I'd also recommend taking a spare female blade connector and connecting it to pin 87 of the relay so there's no chance it will ever ground out or even worse, rub through another wire in the harness and send voltage to something else and possibly fry something expensive!

What kind of mileage is on your 06? Mine is around 135k iirc. We have 4 road vehicles and 4 motorcycles between my wife and I so the truck doesn't get driven unless it's needed.
 

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Discussion Starter #5
Nice, I need to do this to my 2006 6m soon! Couldn't you just run the two wires you added to the blue with trace to a switch in the cab instead of a relay? Granted with a relay you only have to run one hot through the firewall to trip the relay, but then you need to have a relay...

I'm thinking you went more complicated in order to have a lighted switch for the abs.

I'd also recommend taking a spare female blade connector and connecting it to pin 87 of the relay so there's no chance it will ever ground out or even worse, rub through another wire in the harness and send voltage to something else and possibly fry something expensive!

What kind of mileage is on your 06? Mine is around 135k iirc. We have 4 road vehicles and 4 motorcycles between my wife and I so the truck doesn't get driven unless it's needed.
I configured the wiring this way because I wanted the rocker switch to be in the 'off' position when this mod isn't in use. Switching to 'on' means the mod is on and 'off' is off. Keeps it simple in terms of all the rocker switches functioning the same way.

You could configure it the way you describe if you're ok with the switch needing to be left in the 'on' position all the time and then being turned 'off' to activate the mod. Or if you wanted use a more basic switch like those on/off/on styles. The thing with this mod is you can't use a momentary switch because if the connection is restored the ABS will be re-enabled. Definitely protect terminal 87 if not using a relay harness you for sure don't want that contacting anything.

I had 153,000 miles on it when I did this mod and I'm at 173,000 now, the times that I've needed this mod it's worked great. Most recently was on a 120 mile beach adventure down Padre Island National Seashore.
 

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Yea most of my switches are plain black small ones not labeled on or off so I'd just orient it where up is on and down is off or something that feels intuitive to me. More than likely I'll use this https://www.radioshack.com/products/spdt-6a-paddle-sw?variant=20332076549 paddle switch and mount it in the cutout near the ebrake handle on the vertical side next to the cupholders. That way when I'm panicking and reaching for the ebrake I can just flip this switch and disable the Absurdly intrusive Braking System instead. That said I'll probably have down as ABS off so it's quicker to switch off in those moments of ice and snow and bad drivers.

Dealing with lighted switches requires extra thinking/planning/scheming to get everything to work like you want! Glad you figured it out and wrote this writeup!!
 

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Doing mine today.

There's actually TWO blue wires twisted with mating pink wires, looks like it's the blue with single silver dot and not the double dot one.. I just ran two wires through the grommet that the hood latch cable goes through.
124172


Update..
Well the abs light and slip light and 4x4 lights come on, the 4x4 indicator in the tach disappears. Reconnecting the wires through the switch shuts off the 4x4 light and the indicator appears in the tach but the abs and slip lights stay on unless I cycle the ignition quickly. I didn't try driving at all and just checked in the garage.

I have a 2006 Nissan Frontier 6 speed Nismo king cab if that makes any difference. Might try the other blue wire with two dots on it. Just have to pull the volant airbox again, maybe tomorrow.

Just went around the block.. apparently the blue one disables the speedo and resets the mpg and mph average meters on the dash lol. Though it does add a but of plausible deniability to getting pulled over for speeding....

Going to pull the airbox tomorrow and try the other blue wire I guess.

Update #2 Wire 41 definitely doesn't do anything on a 2006 Frontier 6M Nismo and abs still works (found a shaded dirt parking lot with ice still). Last night I actually did wire #11 and that had some effect on the truck warning lights and according to the service manual it's the wire that goes from the Unified Meter Control Unit to the ABS. It shut off the speedo and 4x4 info area and reset the MPG and MPH average meters in the dash. Apparently the xterra an frontier of the same age have the abs work in different ways.


Update #3 What does work but kills the speedo and 4x4 indicator (I can still shift from 2wd to 4wd, just not in or out of 4 Low) is the #4 wire "Ignition switch on or start" on the abs pump connector. No restart required!
 
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