Any ideas on what else to try to turn off the check engine light due to front diff being unplugged???

I got sick of the noises and vibrations and never use 4 wheel drive anyway car is turbo and only sees sand dunes and high speed hard pack trail riding. removed diff made stub axles and shaved about 50lbs out of the front end just wanting to figure out how to turn off the lights i have already tried sticking a jumper wire into the weather pack connecter but no luck.