Use a little piece of aluminum foil which overlaps the tear. Lay the foil over the tear and glue the sides down. Then I would use electrical tape to take it tight. Use an ohm meter to make sure you can draw current through the torn area. I would take the circuit off the cluster to do this. I can't think of another way. You've got to get the foil on top of the copper that's laid on top of the bottom plastic and under the top plastic. That circuit is sandwiched in between two pieces of plastic.
Also, don't let the foil spill over and touch the cluster housing. That will cause voltage to leak into the housing and screw up your ground.
If gluing doesn't work, you'll have to replace that circuit. I looked for places that you could run a strap and couldn't find one.
However, if you have a soldiering iron, you could soldier a strap to two light bulbs which would carry current throughout the dash illumination curcuit. I'm in San Diego right now, so I can't be more specific. But, follow that circuit, I think one bulb is before the tear and three or four are after the tear. Take a bulb and soldier a jumper wire to the correct terminal of one bulb, allowing for enough slack to reach another bulb socket. The soldier the other end to another bulb....and plug in both bulbs. That will jump the tear in the circuit and would probably work better than gluing. However, if one of the bulbs go out, you'll need to resoldier a new one to get illumination for that socket.
if I was at home, I'd try it for you to see if soldiering works......I bet it will.
