Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2. Listen for an audible click when the horn relay operates. Command both the ON and OFF states. Repeat the commands as necessary.
3. Tests for voltage at the coil side of the horn relay. The HORN fuse supplies power to the coil side of the horn relay.
4. Verifies that the body control module (BCM) is providing ground to the horn relay.
5. Tests if ground is constantly being applied to the horn relay.

Fig 1: DTC B2752 (Steps 1 - 5)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC B2752 (Steps 6 - 13)

Courtesy of GENERAL MOTORS CORP.