run a wire straight from the battery to the horn. if it dont honk that way, the horn is bad. get a new one. It may also be the horn contacts in the steering column, If running a strait wire don't work and a new horn don't work, that will be your problem, but try the wire first, Its cheeper.
check wire continuity- no power no lights
It could be the dimmer switch that will adjust the dash lights
If battery is disconnected or replaced, OBD system needs to reboot which may take up to 200 miles of driving. System should be fine after that.
your control module is bad
There is a relay in the emergency brake which turns them off. Sometimes it can be sticky. pull up on emerg pedal.
If the front end is rattling after shocks were replaced on a 1998 Chevy Z71, it could be possible that a bolt was left in the wheel well behind the hubcap. It is also possible that not all of the bolts were tightened down securely.
If it is missing it is probaly a coil pack
You have probably put the distributor back "180 degrees out".
Check the hall sender on the distributor, you can check at the coil connector using a led, it should flash when cranking the engine. After that it is most likely the coil.
?ignition control module/pickup
take a volt Ohm meter to either side of one wire then do the same for the other, if the ohm's dont give you a steady reading then the iwre needs to be replaced.
check fuses