Seat Belt Warning Indicator Always on - Standard Cab

SEAT BELT WARNING INDICATOR ALWAYS ON - STANDARD CAB

Seat Belt Warning Indicator Always On - Standard Cab:

POSSIBLE CAUSES
- (F983) Fused ignition switch output (run-acc) circuit open
- (Z951) Seat belt switch ground circuit open
- (G10) Seat belt switch sense circuit open
- Seat belt tensioner reducer
- Seat belt switch
- Instrument cluster

1. (F983) FUSED IGNITION SWITCH OUTPUT (RUN-ACC) CIRCUIT OPEN




Turn the ignition off.
Disconnect the Seat Belt Tensioner Reducer harness connector.
Turn the ignition on.
Measure the voltage between the (F983) Fused Ignition Switch Output (Run-Acc) circuit and ground in the Tensioner Reducer harness connector.

Q: Is the voltage above 10.5 volts?

YES: Go To 2
NO: Repair the (F983) Fused Ignition Switch Output (Run-Acc) circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. SEAT BELT TENSIONER REDUCER




Ensure that the Seat Belt Tensioner Reducer harness connector is connected.
Measure the voltage between the (G10) Seat Belt Switch Sense circuit and ground in the Seat Belt Tensioner Reducer harness connector (cavity 2).

Q: Is there any voltage present?

YES: Go To 3
NO: Replace the Seat Belt Tensioner Reducer. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. SEAT BELT SWITCH




Turn the ignition off.
Disconnect the Seat Belt Switch harness connector.
Connect a jumper wire between cavity 1 and cavity 2.
Turn the ignition on.
Observe the Seat Belt Warning Indicator.

Q: Did the Seat Belt Warning Indicator illuminate?

YES: Replace the Seat Belt Switch. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Go To 4

4. CHECK THE (Z951) SEAT BELT SWITCH GROUND CIRCUIT FOR AN OPEN




Turn the ignition off.
Measure the resistance between ground and the (Z951) Seat Belt Switch circuit.

Q: Is the resistance below 5.0 ohms?

YES: Go To 5
NO: Repair the (Z951) Seat Belt Switch Ground circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

5. CHECK THE (G10) SEAT BELT SWITCH SENSE CIRCUIT FOR AN OPEN




Disconnect the Instrument Cluster C3 harness connector.
Measure the resistance of the (G10) Seat Belt Switch Sense circuit between the Seat Belt Switch connector and the Instrument Cluster C3 connector.

Q: Is the resistance above 5.0 ohms?

YES: Repair the (G10) Seat Belt Switch Sense circuit for an open. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
NO: Replace and configure the Instrument Cluster. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test