The Mustang Forum for Track & Racing Enthusiasts

Taking your Mustang to an open track/HPDE event for the first time? Do you race competitively? This forum is for you! Log in to remove most ads.

  • Welcome to the Ford Mustang forum built for owners of the Mustang GT350, BOSS 302, GT500, and all other S550, S197, SN95, Fox Body and older Mustangs set up for open track days, road racing, and/or autocross. Join our forum, interact with others, share your build, and help us strengthen this community!

How to enable or disable Daytime Running Lights on a 2012 Boss 302

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

I have seen requests for information on how to enable/disable DRL’s. Enabling DRL’s is required for importing a car into Canada. Some people may think DRL’s are a good safety item. When available as an OEM option, Ford charges $25.00 for them. Some people may have DRL’s and hate them.

Unlike some earlier Ford products, which use a plug-in module for DRL’s, the 2012 Mustang uses a programmable “smart junction box” or GEM to enable DRL’s. There are no extra parts required. This procedure is known to work on the Boss 302 only. It may work on a V6 model. It probably will not work on a Mustang with HID headlights and may actually cause damage.

The GEM uses a PWM signal to run the low beam headlights at approx. 80% of normal intensity.

You will need a Ford IDS with module programming capability. Assuming you know how to program modules, you need to program the GEM with the following data. Note that only line 3 is different. However you must program all the lines. Any custom settings in the Info Center may need to be reset.

As always, use at your own risk.

To enable DRL’s:

GEM 726-01-01 0A0A 43
GEM 726-02-01 03C0 2323 0039
GEM 726-03-01 0240 73
GEM 726-04-01 0234
GEM 726-05-01 040C 43
GEM 726-06-01 0000 34
GEM 726-07-01 2505 5F
GEM 726-08-01 0105 0A46
GEM 726-09-01 8000 B7
GEM 726-10-01 8008 0000 00C6
GEM 726-10-02 0000 0000 003F
GEM 726-10-03 0000 0000 0040
GEM 726-10-04 0000 41
GEM 726-11-01 1400 53

To disable DRL’s:

GEM 726-01-01 0A0A 43
GEM 726-02-01 03C0 2323 0039
GEM 726-03-01 0040 71
GEM 726-04-01 0234
GEM 726-05-01 040C 43
GEM 726-06-01 0000 34
GEM 726-07-01 2505 5F
GEM 726-08-01 0105 0A46
GEM 726-09-01 8000 B7
GEM 726-10-01 8008 0000 00C6
GEM 726-10-02 0000 0000 003F
GEM 726-10-03 0000 0000 0040
GEM 726-10-04 0000 41
GEM 726-11-01 1400 53
 

TMO Supporting Vendors

Latest posts

Buy TMO Apparel

Buy TMO Apparel
Top