Pinpoint Test J: C1989: PARK BRAKE APPLY AND RELEASE SWITCH CONTACTS ENERGIZED SIMULTANEOUSLY

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

J1 CHECK FOR ELECTRONIC PARKING BRAKE (EPB) PIDs
- Connect the diagnostic tool.
- Using the diagnostic tool, monitor the EPB PIDs when the EPB switch is in its apply, neutral, and release positions.
- Do the EPB PIDs match the EPB switch positions
- Yes : GO to J2.
- No : INSTALL a new EPB switch. REFER to PARKING BRAKE SWITCH in this article . CLEAR the DTCs. REPEAT the self-test. RESET the EPB system. REFER to ELECTRONIC PARKING BRAKE (EPB) RESETTING in this article .

J2 CHECK THE EPB CIRCUITS FOR SHORTED TOGETHER

Disconnect the battery. Refer to CHARGING SYSTEM - GENERAL INFORMATION .
Disconnect: EPB Module C4205b.
Disconnect: EPB Switch C3218.
Disconnect: EPB Actuator C4206.

Check the following EPB module C4205b circuits for a short together as follows:

EPB MODULE C4205B CIRCUITS SPECIFICATIONS

Circuit	EPB Actuator Pin	EPB Module Pin
9-CG20 (BN/WH)	EPB actuator and EPB switch ground	12
10-CG15 (GY/VT)	EPB release	6
8-CG15 (WH/BU)	EPB apply	5

Fig 1: Checking EPB Module C4205B Circuits For Short

Courtesy of FORD MOTOR CO.

Are any of the resistances less than 10,000 ohms

Yes : INSTALL a new EPB module. REFER to PARKING BRAKE MODULE in this article . CLEAR the DTCs. REPEAT the self-test. RESET the EPB system. REFER to ELECTRONIC PARKING BRAKE (EPB) RESETTING in this article .
No : REPAIR the affected circuits. CLEAR the DTCs. REPEAT the self-test. RESET the EPB system. REFER to ELECTRONIC PARKING BRAKE (EPB) RESETTING in this article .