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

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
 

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