SAAB WIS ONLINE

CHECK STOP LIGHT AND BRAKE SWITCH

CHECK STOP LIGHT AND BRAKE SWITCH

TROUBLE SYMPTOM:

Cruise control cannot be set.

WIRING DIAGRAM:


CHECK STOP LIGHT AND BRAKE SWITCH CIRCUIT.

Turn the ignition switch to OFF.

Disconnect the stop light and brake switch harness connector.

Turn the ignition switch to ON.

Turn the curise control main switch to ON.

Measure the voltage between harness connector terminal and chassis ground.

Connector & terminal

(B65) No. 2 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

• Check the fuse No. 16 (in fuse & relay box).

• Check the harness for open or short between stop light/brake switch and fuse & relay box.


CHECK STOP LIGHT AND BRAKE SWITCH CIRCUIT.

Measure the voltage between harness connector terminal and chassis ground.

Connector & terminal

(B65) No. 4 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes


No

• Check the harness for open or short between stop light/brake switch and cruise control module (AT model).

• Check the clutch switch and circuit (MT model).


CHECK STOP LIGHT AND BRAKE SWITCH CIRCUIT.

Turn the curise control main switch and ignition switch to OFF.

Disconnect the cruise control module harness connector.

Measure the resistance between cruise control module harness connector terminal and stop light and brake switch harness connector terminal.

Connector & terminal

(B94) No. 20 — (B65) No. 3:

(B94) No. 16 — (B65) No. 1:

Is the resistance less than 10 Ω?

Yes


No

Repair the harness.


CHECK STOP LIGHT AND BRAKE SWITCH.

Remove and check the stop light and brake switch.

Are the stop light and brake switch OK?

Yes

Stop light and brake switch circuit are OK.


No

Replace the stop light and brake switch.