How are Parking Brake Activation Switch issues diagnosed?
Parking brake failure would cause the technician to diagnose the small parking brake system, and likely by connecting a diagnostic scan tool. This method would allow him or her to monitor the result of pressing the parking brake activation switch, and, if it doubles as a deactivation switch, that function can be monitored as well. If it is found that the switch sends no signal or sends an improper signal, the switch will be back probed at the connector to ensure that the control module reading is the same as the reading at the parking brake switch. If so, the parking brake activation switch will be replaced.
How are Parking Brake Activation Switches replaced?
Replacement will only involve removing the switch with a non-marring pry tool, or by removing the surrounding trim panel to extract its' mounting fasteners. Afterwards, the electrical connector is removed, and replaced on the new switch. The connector and surrounding area may need to be cleaned as well.
RepairPal Recommendations for Parking Brake Activation Switch issues
When dealing with electronic systems, we recommend thorough diagnostics before replacing parts. In effort to correct an electronic failure, it would be very easy to spend hundreds of dollars replacing components before realizing the issue is more advanced. In the case of electronic failures, diagnostics is a must.
What to look out for when dealing with Parking Brake Activation Switch issues
Though these systems are becoming more common, most vehicles use mechanical levers to actuate the parking brake, and these systems have their own sets of issue and causes. Also, electronic parking brakes may not actuate if the service brake wear indicators have alerted the body control module of low brake pad thickness. This would seem as if the switch were faulty, except a message would appear as feedback to the parking brake switch.
Can I replace the Parking Brake Activation Switch myself?
The parking brake switch can be diagnosed and replaced by almost anyone. It is a simple two or three way switch, and it can be tested without a diagnostic scan tool. In most cases, a diagnostic scan tool is used for efficiency and speed rather than necessity, so understanding the circuit will allow the DIY mechanic to accomplish this repair at home.
