Speed meter lights not working

Check if you have a blown fuse

Could be the clock spring assembly in the steering column . Do you know what that is ? The clock spring allows the buttons on the steering column to be connected to the vehicle .
How cars clock spring works
Testing the electrical with a DVOM -digital volt ohm meter is the proper way to diagnose electrical systems . Viewing wiring diagrams to see where connections are for easy testing of the circuit .

http://www.bbbind.com/free_tsb.html Enter vehicle info . year , make , model engine . Under system click on engine ,then under subsystem click on speed controls . Hit the search button , then click the blue link .Scroll down to second diagram an you will see the air bag slide contacts . This is a clock spring I think , never had your type vehicle apart . Do you also have a air bag light on ?

VEHICLE RELAYS Operation Diagnosis

1992 Toyota Celica alternator connections:
The alternator has three wires that are connected at the rear of alternator by means of a connector.
One wire goes to the speed meter to light the charging bulb, other wire comes from ignition switch through fuse and the third wire has all time 12 Volts through fuse.

I would say that your reverse light switch is faulty, 98% sure its on your transmission. As for your cd player, you may have to replace that with another unit.

what is the code could be fuse related or connection related even a defective speed sensor

It sounds like just the one problem. Your tails and the dash illumination lights are all on the one circuit that the fuse keeps blowing. Don't get confused thinking of another main fuse, just focus on this one circuit..
It is very seldom that a short develops at the fuse box, it certainly can happen from corrosion or loose terminals, but it is rare. More likely is a bad wire just like the one you found near the exhaust. Somewhere very likely a wire has had insulation stripped or scraped off, soon as the wire touches metal it will blow the fuse. Were any other wires damaged in that harness for the speed sensor? Or do you see any wires hanging down from under the truck, anywhere going back to the tail lights?
If you did the stereo yourself, were any wires cut going to the dash? I doubt this as the wire for the dash lights would be in a wiring harness that is like a bundle from under the dash up to the instrument cluster. You just have to keep looking for the short.

WELL YOU HAVE TO USE A VOLT METER CONNECT ONE VOLT METER WIRES TO GOOD GROUND AND THE OTHER VOLT METER WIRES GOES TO EACH SWITCH SPEED.IF VOLT METER GET VOLTAGE A 1 OR 2 CONTROL SPEED RESISTOR BAD.IF RESISTOR BAD YOU WILL GET 1 OR 2 BLOWER MOTOR SPEEDS.IF BLOWER MOTOR WORKING.CHECK THE AC AND HEATER CONTROL SWITCH FUSE OR CHECK BLOWER MOTOR FUSE AND RELAY.IF ALL GOOD SO FAR CONTROL SWITCH ITSELF COULD BE FAULTY.

CHECK THE VACUME HOSE TO THE SENSOR IT IS LOCATED ON THE FIRE WALL A ROUND PLASTIC DEVICE WITH A HOSE AND 2 WIRES CONNECTED TO IT IT MAY BE FAULTY

Check the fuse.

IT SOUNDS LIKE YOU HAVE BROKEN WIRE LEADING TO SPEED SENSOR IN REAR DIFF..CHECK FOR ANY SPOTS IN HARNESS WHERE IT LOOKS OUT OF PLACE OR RUBBING ON SOMETHING..ALSO CHECK FOR SPREAD CONNECTIONS IN PLUG AT SENSOR..CHECK ALL FUSES RELATED TO ABS SYSTEM IN UNDERHOOD FUSE/RELAY CENTER