The headlight have a fuse for each side. Its a 10a for left and right (low beams). This will help you from disconnecting the battery in the short term.
Being in Canada i would be your DRL module is causing you issues. Its located on the core support behind the head lights. If you lay on the ground and look up you should see it. It will be the only module on the driver side. Unplug it and you will be in US spec meaning no DRL's. If your issue is gone than it was you problem.
Post back with a result, if need be I will dig in the manual for you.
99 x-cab 4x4 4.0l auto
mods, cranked t-bars, silencer delete, k&n drop in, Rebuilt trans ,Trans Go stage 3 shift kit, 3200stall Fuddle Racing Torque Converter,
VANIR 63mm TB, Roush split rear exit exhuast, E-Fan, JBA Headers
Auto up/down both windows, OHC, EATC (soon to be modded)
03 Crown Victoria Police Interceptor