What would cause all light to come on and horn and cooling fans to come on simultaniously without ignition on.

Hi Pushrod. I can say without a doubt that the battery cables were hooked up correctly. I am interested in what you mean by It has most likely shorted ignition circuit to battery power. Could you elaborate on that? I have looked at the electrical wiring drawings and the only common device I can see to cause all these issues is the BCM the only anomaly is why the wire from the solenoid to the alternator smoked. Firstly it should have had a fuse but aside from that I can't see what would cause a short through the alternator. Let me know what you think. Thanks for the reply. RobC0002

The lights and horn I can understand as it is possibly the security system, however the cooling fans and smoking wire is another matter! .. Disconnect the alternator wire and 'momentarily' attach jumpers to see IF sparks fly.. IF so, start unhooking possible sources of a short circuit trying the jumper each time .. Smoking wire is the result of a dead short (SOMEWHERE)... Without a wiring schematic in front of me, it's 'very' difficult to say... With a schematic in front of me, then it's just difficult to say! .. Look for a short in the wire from solenoid to alternator etc..for a possible 'shorted' battery power feed to ignition switch .. Possibly even 'rodent' damaged wiring .. There really isn't a repair protocol for this type issue, just hands-on testing .. Good luck with it!