Chris Bain
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Is There any difference between the 1991 and 1994 Steering Columns in the Ignition switch and other wiring on the GMC Z71 Sierra 1500? 
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1991 & 1994 Steering Columns?
- Thread starter Chris Bain
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eoncathell
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In 1991-Inter cooled and non-intercooled trucks had different wiring harnesses. Manual and automatic transmission trucks had different harnesses.
1989-1993 diesel trucks require a specific part number for their computer because there were so many variations.
On 1994 and newer Dodge trucks, there are so many variations of wiring harnesses that having a part number becomes critical. If you can't find a part number for the wiring harness you need because it has been removed or the vehicle has had a fire, you can ask the parts department of your Dodge dealer for it. You will need the last 9 digits of the vehicle's VIN for the dealer to be able to check. The wiring harness part number on 1994-2002 2500 and 3500 models and 1994-2001 1500 models is on the side of the fuse box. The computer is in the engine compartment on the passenger side of the firewall. The wiring harness breaks down into 5 components:
1. The engine harness supplies connections to the alternator, fuel injection and distributor. The part number is on a tag near the brake booster.
2. The front harness supplies connections to the headlights, parking lights, and front ABS sensors. The fuse box and the front harness are hardwired together. The part number is on the side of the fuse box.
3. The frame harness disconnects under the drivers side front wheel well behind the inner fender. It supplies connections to the fuel tank, tail lights, brake lights and rear brake ABS sensor.
4. The under dash harness connects the instrument cluster, steering columns, ignition and radio.
5. The body harness attaches to the body computer, power seats, rear dome light and seat belts.
Some 1994 trucks had front ABS brakes. If there is an electric wire attached to the flexible hydraulic brake hose, the vehicle has ABS brakes. If there is no wire, the vehicle does not have front ABS brakes.
1994 and 1995 V10 engine trucks have an ignition module located on the passenger side front fender behind the washer fluid reservoir.
The instrument cluster on 1994-97 Dodge trucks can be disassembled and parts replaced.
The computers really became important for diagnostic code retrieval from 1994 and newer.
The computer on 1994-2006 Dodge trucks is in the engine compartment on the passenger side of the firewall. On 1994-95 trucks it was encased in a black plastic cover.
1989-1993 diesel trucks require a specific part number for their computer because there were so many variations.
On 1994 and newer Dodge trucks, there are so many variations of wiring harnesses that having a part number becomes critical. If you can't find a part number for the wiring harness you need because it has been removed or the vehicle has had a fire, you can ask the parts department of your Dodge dealer for it. You will need the last 9 digits of the vehicle's VIN for the dealer to be able to check. The wiring harness part number on 1994-2002 2500 and 3500 models and 1994-2001 1500 models is on the side of the fuse box. The computer is in the engine compartment on the passenger side of the firewall. The wiring harness breaks down into 5 components:
1. The engine harness supplies connections to the alternator, fuel injection and distributor. The part number is on a tag near the brake booster.
2. The front harness supplies connections to the headlights, parking lights, and front ABS sensors. The fuse box and the front harness are hardwired together. The part number is on the side of the fuse box.
3. The frame harness disconnects under the drivers side front wheel well behind the inner fender. It supplies connections to the fuel tank, tail lights, brake lights and rear brake ABS sensor.
4. The under dash harness connects the instrument cluster, steering columns, ignition and radio.
5. The body harness attaches to the body computer, power seats, rear dome light and seat belts.
Some 1994 trucks had front ABS brakes. If there is an electric wire attached to the flexible hydraulic brake hose, the vehicle has ABS brakes. If there is no wire, the vehicle does not have front ABS brakes.
1994 and 1995 V10 engine trucks have an ignition module located on the passenger side front fender behind the washer fluid reservoir.
The instrument cluster on 1994-97 Dodge trucks can be disassembled and parts replaced.
The computers really became important for diagnostic code retrieval from 1994 and newer.
The computer on 1994-2006 Dodge trucks is in the engine compartment on the passenger side of the firewall. On 1994-95 trucks it was encased in a black plastic cover.