YOU GOT GAUGES!!!! Drooool....... .Somebody ordered that car RIGHT! Yes, in the FSM the non-gauge wiring shows dark blue and light blue as the blinker wire colors. The gauges schematic in the accessories section does not. GM is pretty dependable on it's colors so I would figure the colors are the same for the gauge wiring. They are just pinned differently. Just trace the printed circuit back to the connector cavity. [one side of the bulb cavity will be power from the blinkers, the other side a ground]. Compare the wire end of connector to the cavity and you should get dark and light blue wires. Test those and if one is dead then you must follow it all the way back to where the splice is in the blinker wiring. In cases like this, where the wire is buried deep in a harness, you have two choices: find the wire where it is broken and fix it- or run a whole new wire and splice it into the wiring that does work.
.Somebody ordered that car RIGHT! Yes, in the FSM the non-gauge wiring shows dark blue and light blue as the blinker wire colors. The gauges schematic in the accessories section does not. GM is pretty dependable on it's colors so I would figure the colors are the same for the gauge wiring. They are just pinned differently. Just trace the printed circuit back to the connector cavity. [one side of the bulb cavity will be power from the blinkers, the other side a ground]. Compare the wire end of connector to the cavity and you should get dark and light blue wires. Test those and if one is dead then you must follow it all the way back to where the splice is in the blinker wiring. In cases like this, where the wire is buried deep in a harness, you have two choices: find the wire where it is broken and fix it- or run a whole new wire and splice it into the wiring that does work. 
