Visual Inspection and Diagnostic Pre-Checks

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Make sure AJB fuse 2 (4A) is OK.

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

Fig 1: Traction Control Switch Connector - C3825

Courtesy of FORD MOTOR CO.

Harness Side

CIRCUIT AND PIN DESCRIPTION

Circuit	Pin
GND (Ground) - GD214	4 (BLACK/BLUE)

W1: CHECK THE TRACTION CONTROL SWITCH

Ignition OFF.
Traction Control Switch connector disconnected. (C3825)

Measure the resistance between:

(+) Traction Control Switch (C3825) Connector, Component Side	(-) Traction Control Switch (C3825) Connector, Component Side
TCS	GND - GD214 - Pin 4

Press and release the traction control switch.
Is the resistance less than 3 ohms with the switch pressed and greater than 10, 000 ohms with the switch released?

Yes	No
If the indicator is inoperative, Go to W2. If the indicator is always on, Go to W6.	INSTALL a new traction control switch.

W2: CHECK THE TRACTION CONTROL SWITCH LED VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

Ignition ON, engine OFF.

Measure the voltage between:

(+) Traction Control Switch (C3825) Connector, Harness Side	(-)
IGN START/RUN	Ground

Is the voltage greater than 11 volts?

Yes	No
Go to W3	REPAIR The circuit.

W3: CHECK THE INDICATOR CONTROL CIRCUIT FOR AN OPEN

Ignition OFF.
ABS Module connector disconnected.

Measure the resistance between:

(+) ABS Module Connector, Harness Side	(-) Traction Control Switch (C3825) Connector, Harness Side
TCIL	TCIL

Is the resistance less than 3 ohms?

Yes	No
Go to W4.	REPAIR the circuit.

W4: CHECK THE TRACTION CONTROL SWITCH SIGNAL CIRCUIT FOR AN OPEN

Measure the resistance between:

(+) ABS Module Connector, Harness Side	(-) Traction Control Switch (C3825) Connector, Harness Side
TCS	TCS

Is the resistance less than 3 ohms?

Yes	No
Go to W5.	REPAIR the circuit.

W5: CHECK THE TRACTION CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN

Measure the resistance between:

(+) Traction Control Switch (C3825) Connector, Harness Side	(-)
GND - GD214 (BLACK/BLUE) - Pin 4	Ground

Is the resistance less than 3 ohms?

Yes	No
Go to W8	REPAIR the circuit.

W6: CHECK THE LED CONTROL CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.
ABS Module connector disconnected.

Measure the resistance between:

(+) Traction Control Switch (C3825) Connector, Harness Side	(-)
TCIL	Ground

Is the resistance greater than 10, 000 ohms?

Yes	No
Go to W7.	REPAIR the circuit.

W7: CHECK THE TRACTION CONTROL SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND

Measure the resistance between:

(+) Traction Control Switch (C3825) Connector, Harness Side	(-)
TCS	Ground

Is the resistance greater than 10, 000 ohms?

Yes	No
INSTALL a new traction control switch. TEST the system for normal operation. If the concern is still present, Go to W8.	REPAIR the circuit.

W8: CHECK FOR CORRECT ABS MODULE OPERATION

Ignition OFF.
Disconnect and inspect the ABS module connector (if not previously disconnected).
Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
Reconnect the ABS module connector. Make sure it seats and latches correctly.
Operate the system and determine if the concern is still present.
Is the concern still present?

Yes	No
INSTALL a new ABS module. CHECK OASIS for any applicable Technical Service Bulletins TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to the Anti-Lock Brake System (ABS) and Stability Control article. ORDER a replacement ABS module and INCLUDE the RVC on the form. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

Yes

INSTALL a new ABS module.
CHECK OASIS for any applicable Technical Service Bulletins TSBs.
If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.
If no TSBs address this concern, INSTALL a new ABS module. REFER to the Anti-Lock Brake System (ABS) and Stability Control article.
ORDER a replacement ABS module and INCLUDE the RVC on the form.
If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.

The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.