For 1990-2009 cars

# HORN CHIRPS INTERMITTENTLY (INSTALL NEWTON CONTACT ASSY.)

#### SUBJECT: HORN CHIRPS INTERMITTENTLY OR SOUNDS CONTINUOUSLY. (INSTALL NEW HORN CONTACT ASSEMBLY)

#### VEHICLES AFFECTED: 1989-93 "C,E,K" MODELS

This bulletin is being revised to include the 1993 model year.

Some owners of 1989-93 C, E and K vehicles equipped with Supplemental Inflatable Restraint (SIR) may experience a condition where the horn chirps intermittently or sounds continuously. To repair this condition use the following procedure:

1. Disable the SIR system. Refer to Section 9J in the Service Information Manual.

2. Disable the horn by removing the horn relay.

3. Remove the SIR inflator module from the steering wheel. Refer to Section 3F in the Service Information Manual.

4. Remove steering wheel using Kent-Moore special tool J-1859-03. Refer to Section 3F in the Service Information Manual.

5. Place steering wheel on a solid work surface that is covered with a soft cloth so that it rests on its rim with its back facing up. Refer to Figure 1.

6. Tap out the two spiral tap fasteners which retain the horn contact assembly to the steering wheel using an appropriately sized hardened punch and hammer. Refer to Figure 1.

7. Turn steering wheel over so that it rests on its back side with the rim facing up.

8. Replace the horn contact assembly with a new service horn contact assembly, P/N 16750500.

#### NOTE: Do not substitute any component parts from one horn contact assembly to another. Proper operation of the horn contact assembly requires that it be replaced as a complete assembly.

9. Align new horn contact assembly to steering wheel.

10. Hand start two new spiral tap fasteners and gently tap with a hammer to set them. DO NOT attempt to drive the fasteners fully at this time.

11. Fully seat the two fasteners using an arbor press, if available, making certain the fasteners are driven straight and fully seated. The horn contact assembly should be tight against the centre hub of the steering wheel.

If an arbor press is used to seat the fasteners, continue with step 16. If an arbor press is not available, continue with step 12.

12. Place steering wheel with its back side down on top of a large socket so that the socket rim supports the metal insert of the steering wheel as close to the fastener holes as possible.

13. Have another technician stabilize the steering wheel on top of the socket by supporting the rim with two hands.

14. Drive the two spiral tap fasteners with a hammer and hardened punch large enough to cover the spiral tap fastener head.

15. Ensure that the fastener's are driven straight and fully seated. The horn contact assembly should be tight against the centre hub of the steering wheel.

16. Install steering wheel to steering column. Refer to Section 3F in the Service Information Manual.

17. Install the SIR inflator module to the steering wheel. Refer to Section 3F in the Service Information Manual.

18. Enable the SIR system. Refer to Section 9J in the Service Information Manual.

For vehicles repaired under warranty use:

Labour Operation: E7100 Labour Time: .7 Hours

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.