ABS lamp oncontinuously

Symptom: The ABS (ANTI LOCK) lamp remains on continuously.

ABS lamp on continuously

Fault symptom

The ABS (ANTI LOCK) lamp remains on continuously.

Condition

Short circuit to ground in the electrical circuit.

Diagnostic procedure

1 Check the fuses

-	Check that fuse 19 is intact.

Is fuse 19 intact?

yes

Continue with point 2.

no

Change the fuse.

2 Check the ABS lamp

-	Unplug the control module's 25-pin connector. Ignition switch in the ON position.

Is the ABS lamp on?

yes

Check the lead between pin 1 of the ABS control module and pin 16 of the main instrument display panel. If the lead is OK, continue fault diagnosis as described in Service Manual 3:5, Electrical system, Main instrument display panel .

no

Continue with point 3.

3 Check the control module's power supply (+15 circuit)

-	Unplug the control module's 4-pin connector.

-	Ignition switch in the ON position. Take a voltage reading across battery positive (B+) and pin 1 of the control module connector. A reading of <0.5 V should be obtained.

Is the voltage reading OK?

yes

Continue with point 5.

no

Continue with point 4.

4 Check the power supply (+15 circuit)

-	Check that fuse 19 receives current (+15 circuit). Ignition switch in the ON position. Connect the test lamp to fuse 19 and a good grounding point.

Does the test lamp light up?

yes

Check the lead and connectors between fuse 19 and pin 1 (4-pin connector) of the control module. Rectify if necessary.

no

Continue fault diagnosis as described in Service Manual 3:2 Electrical system, wiring diagram, power supply.

5 Final check

-	Check that the ABS (ANTI LOCK) lamp lights up when the ignition is switched on.

Does the ABS lamp work correctly?

yes

The diagnostic procedure carried out was correct.

no

Continue with