So for a while I’ve been trying to retrofit a few things on my 16 L405. Recently was able to get LDW and TSR done. I held up on doing the ACC radar sensor in the front bumper as I found the wiring is not there. Well I’m too stubborn for that to stop me so I’m trying to source the wire harness and some pigtail. I have the wiring diagrams that are in the Wiki here but may need help finding where the module is for the can bus wires. If anyone has any better wiring diagrams or module locations that would help me narrow down where I should be looking that would be great! Thanks

Here you go, I got these from the Interactive wiring diagrams, seems easy enough, biggest problem is the connector for the radar sensor isn't available as a serviceable item (so you could make an overlay loom) as it comes as part of the L/H/S engine loom. Besides that it's a feed from the rear junction box and IGN feed from the gateway module. A specific length ground wire and HS canbus from the ECM but could be tapped from the ABS module (as it's closer).

Hope it helps!

https://www.fullfatrr.com/gallery/thumbnails.php?album=4568 L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

This great actually thank you! I kinda had an idea of what needed to be done from the wiki wiring diagrams but was curious where to tap the canbus wires into. I’ve already had to do some of my own wiring as for some reason my 2016 wasn’t wired for anything then what it came with from the factory. Wiring is no biggie to me as long as I can find places to splice into. Now to just find the radar harness pigtail so I can get started.

Seems crazy that the speed control module connector isn't a serviceable item as considering it's mounted in the crash bar it stands a good chance of damage in a frontal collision. At least you can order the pins for repinning the connectors at the gwm etc, probably not cheap for what they are but less hassle!

If you need anything else, just shout!

Mike L405 SV Autobiography LWB SDV8, finished in Aston Martin China Grey by ETO division.

From what I understand if the harness gets damaged most places source used parts and buy harness pigtails instead of buying the whole left side engine wire harness as they are not cheap and labor intense plus they need to be ordered for what the vehicle has so they often don’t end up being the right harness. For the most part it seems just running the wires to the designated locations will take the longest part of the job.

4RRS wrote:

Here you go, I got these from the Interactive wiring diagrams, seems easy enough, biggest problem is the connector for the radar sensor isn't available as a serviceable item (so you could make an overlay loom) as it comes as part of the L/H/S engine loom. Besides that it's a feed from the rear junction box and IGN feed from the gateway module. A specific length ground wire and HS canbus from the ECM but could be tapped from the ABS module (as it's closer).

Hope it helps!

https://www.fullfatrr.com/gallery/thumbnails.php?album=4568

Well front ACC radar is in and working great. So I was able to do both retrofits when it looked like I wasn’t gonna be able to. Had to wire in the front radar sensor but was fairly easy and not elaborate. Thanks for all the help from the forums and Patrick from Gap to be able to do this.

sconnell80 wrote:

So for a while I’ve been trying to retrofit a few things on my 16 L405. Recently was able to get LDW and TSR done. I held up on doing the ACC radar sensor in the front bumper as I found the wiring is not there. Well I’m too stubborn for that to stop me so I’m trying to source the wire harness and some pigtail. I have the wiring diagrams that are in the Wiki here but may need help finding where the module is for the can bus wires. If anyone has any better wiring diagrams or module locations that would help me narrow down where I should be looking that would be great! Thanks

It was actually really easy once I sourced the ACC radar harness. One wire goes to ground by left front wheel, ran 2 wires to fuse panel under cowl. One for 12vall time and one for ignition 12v and the 2 can us wires I ran to the abs module and tapped them in to the same color wires as the ACC radar wires. Coded with Gap tool and all done