rolander

Ok very new to the forum. Scratching my head on this one. 05 Tahoe LTZ 212,000 miles. Was running great till the other day. I found out it had an astrostart in it. I pulled the module down got the model which is the 2205U ordered a remote for it programmed it good to go. Wife happy me happy life is good. Saturday I noticed a wire disconnected from the astrostart. So I went to pull the module out and while I was doing so, the horn started going off continuously with out stopping. Had to disconnect the battery, I Checked all the astrostart wires they are all soldered and correctly installed, I Found one wire up by the ignition that was bare where it was soldered. Maybe shorted out on the column. I don't know. All I know is now I have the service 4x4 on the dash, the vehicle will not start. and when the astrostart module is connected the horn blares as soon as I switch the key on. If I disconnect the astrostart the horn does not blare but when I got to start it the lights flash on and off while the key is in start position.

I hooked up a scanner and found it would not connect to the PCM, I replaced the Cig lighter fuse and got a connection. Codes coming up are U1000 Class 2 data link malfunction, C0379 front axle circuit malfunction, and code B0790 Transfer case neutral indicator circuit. Now I have not had any issues regarding the 4x4 prior to this problem. I'm at a loss here. Any idea from you knowledgable folks? Any ideas on what I may have fried?

Thanks in advance