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'93 940 - No brake lights / no cruise control 900

Dear Fellow Brickboarders,

Hope you're well. n the FAQs, under "Cruise Control Diagnostics", the following appears: "While the diagnostic light is blinking rapidly press the brake pedal for one second. Code 1-3-2 should be issued. If no code here, check the brake light switch."

I did this test. The OBD light continued to blink rapidly, after I pressed the brake pedal for a second. Does the continued rapid blinking of the OBD light mean that Code 1-3-2 has not been set, i.e., that the brake light switch has failed?

Put another way, do the words "no code here" mean that a failed brake light switch causes the rapidly-blinking OBD light to continue blinking rapidly? And, if the brake light switch is in good order, will the OBD light's rapid blinks be replaced by blinks signifying code 1 - 3 - 2?

I tested the brake light switch by connecting both wires. The brake lights did not come on. That suggests that the brake light switch isn't getting power.

The red "running lights" come-on, when the the parking light switch is turned to the middle position.

I substituted two "bulb failure Sensors" - likely good - with no change. I inspected Fuse 4 (Brake Light and Brake Light Switch) and Fuse 12 (Bulb Failure Sensor) and found no obvious defect.

I suspect I overlook something obvious. Any suggestions?

Thanks for your help.

Yours faithfully,

Spook






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New '93 940 - No brake lights / no cruise control [900]
posted by  spook  on Wed Feb 10 15:31 CST 2016 >


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