Hazard Warning Switch: Testing and Inspection

HAZARD SWITCH

WARNING: To avoid serious or fatal injury on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment.

The hazard switch as well as the hard wired inputs and outputs of the switch may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information.

1. Remove the hazard switch from the Steering Control Module (SCM).

2. Using a multi-meter, test the continuity between the two terminals of the switch. There should be continuity when the switch push button is in its unlatched (raised) position, and no continuity when the switch push button is in its latched (lowered) position.

3. If the switch fails either of the continuity tests, replace the ineffective hazard switch as required.