When working on this system, observe the following precautions:
| • | Before welding on the vehicle with an electric welding unit, complete
the following steps: |
| 1. | Turn the ignition switch OFF. |
| 2. | Disconnect the EBCM connectors. |
| • | Do not use a fast charger for starting the engine. |
| • | Disconnect the negative battery cable when fast charging. |
| • | Never disconnect the battery from the vehicle electrical system
while the engine is running. |
| • | Connect all wiring harness connectors securely. |
| • | Proper speed sensor wiring, routing and retaining are necessary
in order to prevent false signals due to electrical noise. You can achieve
proper system operation only by restoring the system to its original condition. |
| | When servicing the ABS, note the routing, position, mounting and locations
of the following items: |
Follow the above mentioned precautions when working on ABS. Familiarize
yourself with ABS and its' relationships with other components on the vehicle.
You must have a basic knowledge of the following items before using
this section. Without this basic knowledge, you will have difficulties using
the diagnostic procedures contained in this section.
If you need a review of basic electrical troubleshooting, refer to Circuit
Testing in Wiring Systems. Additionally, General Motors Service Training
offers courses in electrical and electronic service.
