2001 jeep cherokee, had a 2wd aw4 in it, switched to a 4x4 aw4 from a 99 cherokee, got everything on, all plugs connected (none looked dirty), go to start my jeep, it cranks but wont turn over, gauges dont work, odometer reads "no bus", while throwing a p1694 code, i read that it could be the...