HUD wiring diagram, plus 2nd gear start switch

quote from crazyk

Quote

I substituted a 1991 euro cluster with oil pressure gauge in place of a regular cluster. The project vehicle is a 1992 lumina sedan. However, I have also dismantled the oil-gauge less cluster and input the info I discovered on it as well. The info here can help you to make any lumina cluster work.

Disclaimer: I donâ€™t know if the all 90-94 base clusters are identical, please check this against your wiring, before you start.

90 and 91 Euro "ub3 type" clusters have oil gauges, 92-94 have voltmeters. 1992 clusters can be either/or they appear to have changed midyear.
Their are 7 seperate clusters used in Luminas that I am aware of:

1990 base cluster: thin lined monstrosity, with a light gray background
1991 - 1994: base cluster with a black ground

1990 gauge cluster: thin lined monstrosity with oil gauge and 3.1 redline
1991 - mid 1992 gauge cluster with oil gauge and 3.1 redline
1991 - mid 1992 gauge cluster with oil gauge and 3.4 redline
mid 1992 - 1994 gauge cluster with oil indicator, charge gauge and 3.1 redline
mid 1992 - 1994 gauge cluster with oil indicator, charge gauge and 3.4 redline

the shift indicator, or filler plate, is interchangeable between all the clusters.

I repinned my own connector. with practice and a good narrow jewelers screw driver it's quite easy. Just remember to tweek the lock tangs to ensure they lock when you reinsert. I would snatch an extra instrument cluster adapter before starting and practice depinning and reinstalling. I emptied an extra connector and transfered the wires one by one, so I wouldn't get confused.

Additionally, this swap requires a new temp and oil pressure sender (if oil gauge cluster) in place of the original switch. The sensor harness connectors are identical. Remember the oil sender is about twice as long as the switch.

The top row is C, bottom row is D and they go 1-16, left to right.

For the Base Cluster
First number is the base cluster pin location. Then the wire color and description. The last number is where it has to be moved to in the euro cluster harness.

1990-1994 Lumina cluster base
C1 not used
C2 not used
C3 PNK/BLK 12+ volts switched Ignition D4/D11
C4 YEL/BLK Low Coolant indicator C16
C5 TAN/WHT Brake Warning indicator D13
C6 Brown charge indicator C15
C7 DK GRN Coolant Temp indicator C7
C8 not used
C9 BLK Ground C2/D6
C10 BRN/WHT Service Engine Soon (SES) (ECM grounds to light) D16
C11 NC (low fuel if equipped)
C12 LT GRN/BLK ABS indicator D13
C13 PPL Fuel Gauge input from sender C5
C14 not used
C15 not used(low oil, if equipped)
C16 LT BLU Left Turn signal indicator C9
D1 Tan Oil Pressure Indicator(grounds to light if no pressure) C13
D2 YEL Fasten Seatbelt indicator(grounds to light) C11
D3 not used
D4 not used
D5 not used
D6 not used
D7 not used
D8 GRY Illumination (variable backlighting) C3
D9 not used
D10 not used
D11 not used
D12 BLK Ground C2/D6
D13 DK GRN Vehicle Speed Sensor (VSS) from ECM D5
D14 not used
D15 DK BLU Right turn signal indicator D1
D16 LT GRN High Beams indicator D2

Ok, here is the pinout for the Euro's fully instrumented cluster.
First number is the base cluster location. Then the wire color and description.

1990-1994 Lumina Gauge cluster
C1 not used possible shift indicator (TAN/BLK if equipped)
C2 BLK Ground
C3 GRY Illumination (variable backlighting)
C4 not used
C5 PPL Fuel Gauge input from sender(grounds to Empty when low
C6 not used
C7 DRK GRN Coolant Temperature gauge input from sender(grounds to peg gauge when hot)
C8 not used
C9 LT BLU Left Turn signal indicator
C10 not used
C11 YEL Fasten Seatbelt indicator(grounds to light)
C12 not used
C13 TAN Oil Pressure sender(grounds to zero guage if low)
C13 not used (non-oil-gauge cluster)
C14 not used
C15 BRN Charge indicator
C16 YEL/BLK Low Coolant indicator (grounds to light if low)
D1 DK BLU Right Turn signal indicator
D2 LT GRN High Beams indicator
D3 no used possible shift indicator (TAN/BLK if equipped)
D4 PNK/BLK 12+ volts switched Ignition
D5 DK GRN Vehicle Speed Sensor (VSS) from ECM
D6 BLK Ground
D7 not used
D8 not used
D9 WHT Tach Signal (analog)
D10 TAN Oil Pressure indicator(grounds to light if no pressure)
D10 not used (oil-gauge cluster)
D11 PNK/BLK 12+ volts switched Ignition
D12 not used
D13 TAN/WHT Brake Warning indicator
D14 not used
D15 LT GRN/BLK ABS indicator
D16 BRN/WHT Service Engine Soon (SES) (ECM grounds to light)

KEY:
not used= no connection, no wire was present, if there is an optional light I listed it. (ie shift if equipped)

For (C3 Pink/Black - Ignition Power D4/D11) this power wire must be spit to have a second wire , as the base cluster has one socket and the full guage cluster has two. in a proper euro harness they link.

For the tach, (D9 White - Tach Wire, analog) this wire is absent from within the car. I discovered that the tack wire is a small gauge white wire in the harness that meets the firewall behind the alternator(the C100 connector). It does not continue past there into the body. Open up this wire loom and youâ€™ll discover bunch of wires. Only about 5 are small gauge, and the white wire will be obvious. Link it from there and run it inside the car to the cluster. Be sure not to have it run where it will get damaged and shorted.

Euro cluster C13 and D10 positions are two possible locations for the oil pressure wires. C13 in for the guage, D10 for the idiot light. This is the only know difference I have found between the two types of clusters.

This is a possible difference, I didn't track this info very well, but Euro cluster D1 and C3 (ie Tan/Blk? ie shift indicator if equipped?) either appear to be possible locations where a manual trans car would have up-shift, or down-shift indicators. I didn't have a year break down for these, sorry.

One last issue, some pins actually are identical to other pins, so a wire could be in a slightly different position (ie C7 instead of D7, fake example) this issue is usually the same number pin but different letter (ie C7=D7, or D13=C14, fake examples) This is visible on the back of the circuit board as the circuit line will run through both pins.