I recently bought a 2005 Cat 216b. Machine runs great, only issue is when you hit the parking brake button to release, the beeping alarm speeds up a little and does not shut off. I have checked all fluid levels, traced down the wiring and cannot find the issue. The one wiring harness plug i found unplugged went to a sensor near the air cleaner. I plugged it back in but that didn't help. Also in the fuse box by your feet, the #1 slot for fuses looks to accommodate a square 40 amp fuse, but that is missing. Could this be the problem??