I have a late 2007 E92 with NFRM FRM2_E89.C09 module.
I have successfully increased the AE voltage in DRL mode by changing just
one function:
PWM_RL_BL_1_FKT_BL
I am not sure if this has also increased the brake light voltage (as the function keyword suggests) but as it's the brake light, this would not be a bad thing. Changing
PWM_SL_V had no affect and I have read this is for the sidemarker LED.
I did originally increase the AE voltage across all modes (DRL, parking/sidelight and low beams) by changing four functions:
PWM_SL_V
PWM_RL_BL_1_FKT_SL
PWM_RL_BL_1_FKT_BL
PWM_RL_BL_1_FKT_PARKL
It might be achieved with less than four changes (the last three?) but I did not experiment any further as I only wanted the DRL mode to be increased.
Initial voltages (with engine running):
- Position 0 or 3 - DRL: 10.3-10.9V
- Position 1 - Parking/ Sidelight: 3.5-3.8V
- Position 2 - Low beam/ Dipped: 3.5-3.8V
I used the hex value FF,1F which sets the voltage to 100% (maximum?) and I am now getting over 14V.