Livnitup

Every possible value at 726-50-01 has been tested. The only way to have parking lamps with no low beams as DRL is as follows:
726-26-02 x1xx xxxx xxxx - enables parking lights as drl
726-50-01 01xx - disables low/turns/fogs/high beam as drl

Motorsports One

Thank you for the ForScan help and big thanks to Ryan B for the quickly built harness. I'm very happy with my Halogen-to-LED conversion!

Airborne_Ape

Just waisted some hours experimenting to try and see if LED halos for DRL is possible.
The 2016 F150 wiring diagram for the BCM seems to hint at it.
Pin 30 and 37 in BCM C2280F
Are listed as: CTRL MOD. - PARK FRONT *** OR FRONT/REAR

I took estimated guesses in the BCM at the following related addresses and worked my way through a bunch of test but there are a lot of settings and combinations to try. These are the lines I went through and tried various combinations of:

726-24
726-26
726-28
726-29
726-45
726-47
726-48
726-49
726-61
726-70

... Also, my video on this is still being edited, currently it's 47 minutes long and has no audio so it needs some more work.

norddu60

And is it possible?

Motorsports One

So nobody has been able to do it yet?

When I set mine for parking lights, I got nothing at all.

When I set it for parking lights and low beam, I got the low beam and the amber outline, but I also got the Raptor grille lights (tapped into the side marker connector that's not being used with the LED headlights) and the taillights.

Livnitup

See the spreadsheet here on rows 13-15: https://docs.google.com/spreadsheets...#gid=107006732

Those pictures are my truck with those values showing parking light only as DRL. I don't know why it's not working for your truck but it does on my '16 with factory LEDs. I haven't compared 2018 LED headlight wiring vs 2016 to see if anything is different but that could very well be the cause if nobody with a 2018 can get this to work.

Motorsports One

Mine is a '15, and we know the TRS harnesses are different for '15 and '16 trucks, so maybe the differences in the way these trucks are wired are causing this glitch.

skrappy31u11b

This thread is the forscan way.... What other way is there?

I just started researching, I have a 2017 XLT with halogen and found Precision Retrofit on another thread and really like their work. I want to get a set of factory 2017 LED headlights and a set of 2018 taillights from PR with some custom paint to match my truck. Just looking into what is needed to make it work. The first thing I found during research was a morimoto harness listed as updated and redesigned "july 2018"...... Suppose to function "like factory". Can it without adding the 2 wire harness described here? Feel free to drop your experiences with conversions.

squidpocalypse

Motorsports One

Can't go wrong at 33% off of what Morimoto is charging for its harness. Don't get scared by the parts about running wires into the cab and pinning them to the BCM connector, I thought it would be a difficult job as was being talked about on the forum, but with a little patience and dexterity, it all went fairly well.