It sounds like Your connector is pinned incorrectly for your cluster.
Quote:
Originally Posted by bigd65
The green wire went to the temp sender
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You have Dark Green from the Coolant-Temp sender. This is right.
Quote:
Originally Posted by bigd65
The blue wire to the oil sender
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According to GM... BLUE (there are 4 blue wires) feed one the indicator lamps.
TAN should be from the OIL pressure sender.
Quote:
Originally Posted by bigd65
The tan wire to the fuel tank
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According to GM... You have the oil pressure sender hooked to the FUEL gauge.
PINK is from the FUEL sender.
Wire Color Table compiled from the 73-87
wiring diagrams in our sister forum.
GM
CKT...DESCRIPTION.........WIRE COLOR
8......Cluster Lamps.........GRAY
11.....High Beam Lamp.....LIGHT BLUE
14.....Left Turn..............LIGHT BLUE
15.....Right Turn.............DARK BLUE
25.....Gen Telltale...........BROWN
30.....Fuel Gauge............PINK
31.....Oil Sender.............TAN
33.....Brake Lamp...........TAN/WHITE
35.....Temp Sender.........DK GRN
39.....Ignition Power.......PINK/BLACK
150...Grounds................BLACK
237...Seat Belt Warning...PINK/WHITE
931...Electric Choke........DARK BLUE
939...IGN Generator........ORANGE (idiot light clusters only)