This may help. I have a '99 Suburban which most likely has the same wiper system. Mine was completely berserk for some time. Would not start when turned on, then later started and would not turn off, would not respond to speed changes - absolutely nuts. Nobody could tell me what was most likely. Consulting forums like this one, I learned of the circuit board on the wiper motor. Easy to change. 10 minutes or so. I think it's called a "wiper module". Found many sources on line from $25 up. Dealer wanted at least $75 for it. Local parts house has them for $35 or so, no waiting. May be the answer. Dealer wanted $75 just to check it out.
Near steering column
yes
Your switch on your steering column
Definitely sounds like an electrical short cutting the power to the ignition system. The first place you may want to start looking is the wiring in the steering column if the windshield wiper controls are on the steering column, or behind the dash if the controls are on the dash. The most obvious signs would be burnt and/or bare wires.
Yes it will, samething
bad switch off the steering column.
Problem with multifunction switch in steering column
in the steering column behind the multifunction switch that works the turn signals wipers etc...
Wiper motor is not working properly or the combination switch in the steering column is not working properly which is the lever that turns the wipers on.
It is likely underneath the plastic shrowd, just to the right of the steering column as you look at the steering wheel.
The steering column diagram for this vehicle can be found in its repair and maintenance manual books. A person can purchase these manual books from an automotive store.
the 1994 'burban steering column is generally the same as all GM light truck steering columns from previous years. Same tools, Same disassembly removal procedures