Pinpoint Test L: The Turn Signal Lamps Are Always On

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

L1 CHECK THE MULTIFUNCTION SWITCH
- Key in OFF position.
- Disconnect: Multifunction Switch C202
- Key in ON position.
- Do the turn lamps continue to flash on and off?
1. YES : Go to L2.
2. NO : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES article. CLEAR the DTCs. REPEAT the self-test.
L2 CHECK CIRCUIT CLS20 (BN/BU) (LH TURN SIGNAL) OR CIRCUIT CLS24 (BN/WH) (RH TURN SIGNAL) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: SJB C2280b
- Measure the resistance between the multifunction switch C202-2 (LH turn lamps), circuit CLS20 (BN/BU), harness side and ground; or between the multifunction switch C202-3 (RH turn lamps), circuit CLS24 (BN/WH), harness side and ground.
- Is the resistance greater than 10,000 ohms?
1. YES : Go to L3.
2. NO : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
L3 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. YES : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
2. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR any DTCs. REPEAT the self-test.