Pinpoint Test N: The Turn Signal Lamps Are Inoperative
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- N1 CHECK THE VOLTAGE TO THE INDICATOR FLASHER
- Disconnect: Indicator Flasher Relay C2047.
- Key in ON position.
- Measure the voltage between the indicator flasher relay C2047-5, harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to N2.
No
REPAIR the supply circuit. TEST the system for normal operation.
- N2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the indicator flasher relay C2047-4, circuit 1205 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to N3.
No
REPAIR the circuit. TEST the system for normal operation.
- N3 CHECK CIRCUIT 44 (LB) FOR AN OPEN OR SHORT TO GROUND
- Key in OFF position.
- Disconnect: Multifunction Switch C202b.
- Measure the resistance between the multifunction switch C202b-4, circuit 44 (LB), harness side and the indicator flasher relay C2047-1, circuit 44 (LB), harness side; and between the multifunction switch C202b-4, circuit 44 (LB), harness side and ground.
- Is the resistance less than 5 ohms between the multifunction switch and the indicator flasher relay; and greater than 10,000 ohms between the multifunction switch and ground?
Yes
GO to N4.
No
REPAIR the circuit. TEST the system for normal operation.
- N4 CHECK THE MULTIFUNCTION SWITCH
- Carry out the multifunction switch component test.
Refer to COMPONENT TESTING for schematic and connector information.
- Is the multifunction switch OK?
Yes
INSTALL a new indicator flasher relay. TEST the system for normal operation.
No
INSTALL a new multifunction switch. Refer to STEERING COLUMN SWITCHES . TEST the system for normal operation.
- Carry out the multifunction switch component test.