So i've swapped my DB2 6.5 into the 94 C3500, the truck runs and drives. The only thing is i have a wire on my opti-shift harness for the speedo sensor output. If possible I'd like to use the stock speedometer just to keep the truck looking original. All of the other gauges work now after swapping. My question is.. Is there anyway i can find the speedometer input wire to the cluster, or make the speedometer work?
I will contact Baumann Electronics to see what kind of source it needs, im assuming if the gauge has power already it will just need the input wire.
Do we know if the odometer/trip meter run off the speedometer? I definitely need the odometer to work to arrange scheduled maintenance, and keep track of things. I've looked up and found the wire colors.
1991 Chevrolet K1500
Instrument Cluster Connector
34 Pin Connector
O
B Wire(s) Colors Circuit Function
17 Brown 437 ECM/PCM
16 Lt Grn/Blk&Lt Gray/Blk 822 VSS-Low
15 White 121 Gauge-Tach
14 Brown 250 Ignition & RWAL
13 Purple/White 821 VSS-High
12 White 696 RWAL
11 Black/White 450 Ground-Gauges
10 Not Used Not Used
9 Not Used Not Used
8 Not Used Not Used
7 Not Used Not Used
6 Not Used Not Used
5 Not Used Not Used
4 Not Used Not Used
3 Light Green & White 11 HeadDimSw&DRL
2 Gray 8 Fuse Block
1 Black 150 Ground
B
O
A Wire(s) Colors Circuit Function
17 Not Used Not Used
16 Red/White 818 Cruise Control
15 Yellow 237 Safety Belt Lamp/Buzzer
14 Dark Green 35 Gauge-Engine Temp Sender
13 Tan 31 Gauge-Oil Pressure Sender
12 Not Used 507 Not Used
11 Not Used Not Used
10 Light Blue 14 Turn Signals
9 Pink/Black 39 Power-Fuse Block
8 Dark Blue 15 Hazard Flashers
7 Lit Orange/Black 419 DRL Module
6 Tan/Black 592 Upshift Indicator Lamp
5 Brown/White 508 ECM/PCM-Check Engine
4 Not Used 69 Not Used
3 Brown 25 Gauge-Ammeter (Generator)
2 Tan/White 33 Parking Brake-RWAL-Brake Press
1 Purple 30 Gauge-Fuel
A
VSS - Vehicle Speed Sensor
DRL - Daytime Running Lights
RWAL - Rear Wheel Anti-Lock Brakes
Thats for a 91. havent found the 94 schematic quite yet.
The problem is there are two VSS sensors. I used the rear speed sensor for the optishift, not sure if that's significant. I could run a aftermarket speedo but i would really like to retain the stock speedo if possible.
I will contact Baumann Electronics to see what kind of source it needs, im assuming if the gauge has power already it will just need the input wire.
Do we know if the odometer/trip meter run off the speedometer? I definitely need the odometer to work to arrange scheduled maintenance, and keep track of things. I've looked up and found the wire colors.
1991 Chevrolet K1500
Instrument Cluster Connector
34 Pin Connector
O
B Wire(s) Colors Circuit Function
17 Brown 437 ECM/PCM
16 Lt Grn/Blk&Lt Gray/Blk 822 VSS-Low
15 White 121 Gauge-Tach
14 Brown 250 Ignition & RWAL
13 Purple/White 821 VSS-High
12 White 696 RWAL
11 Black/White 450 Ground-Gauges
10 Not Used Not Used
9 Not Used Not Used
8 Not Used Not Used
7 Not Used Not Used
6 Not Used Not Used
5 Not Used Not Used
4 Not Used Not Used
3 Light Green & White 11 HeadDimSw&DRL
2 Gray 8 Fuse Block
1 Black 150 Ground
B
O
A Wire(s) Colors Circuit Function
17 Not Used Not Used
16 Red/White 818 Cruise Control
15 Yellow 237 Safety Belt Lamp/Buzzer
14 Dark Green 35 Gauge-Engine Temp Sender
13 Tan 31 Gauge-Oil Pressure Sender
12 Not Used 507 Not Used
11 Not Used Not Used
10 Light Blue 14 Turn Signals
9 Pink/Black 39 Power-Fuse Block
8 Dark Blue 15 Hazard Flashers
7 Lit Orange/Black 419 DRL Module
6 Tan/Black 592 Upshift Indicator Lamp
5 Brown/White 508 ECM/PCM-Check Engine
4 Not Used 69 Not Used
3 Brown 25 Gauge-Ammeter (Generator)
2 Tan/White 33 Parking Brake-RWAL-Brake Press
1 Purple 30 Gauge-Fuel
A
VSS - Vehicle Speed Sensor
DRL - Daytime Running Lights
RWAL - Rear Wheel Anti-Lock Brakes
Thats for a 91. havent found the 94 schematic quite yet.
The problem is there are two VSS sensors. I used the rear speed sensor for the optishift, not sure if that's significant. I could run a aftermarket speedo but i would really like to retain the stock speedo if possible.
