993 Cruise not working
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4th Gear
Joined: Jul 2012
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993 Cruise not working
I have a 97 911. My cruise started malfunctioning by not turning off by touching the brake. Then it just stopped working. I have seen allot on reworking the solder in the brain box but I don’t know where it is located. Any help, please.
Former Vendor
Joined: Jul 2018
Posts: 1,093
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From: SoCal
It's located under passenger seat. The earlier 911 (pre-964/993) cruise control ECUs were less reliable because of solder connections, than the later ECUs. Hopefully, you don't have water damage under the passenger seat.
Former Vendor
Joined: Jul 2018
Posts: 1,093
Likes: 180
From: SoCal
Before soldering, you might consider checking key inputs, e.g. the speedo, brake lights, multiple powers, and the motor/clutch assembly.
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From: Dallas, TX
Hi Burky,
Be aware replacing the stop light incandescent bulbs with LED bulbs will cause the cruise control to not work as it needs to see a resistive load on the circuit to work, LEDS do not provide this.
Knowing this, I would check that the tail lights are incandescent and are working properly as a faulty brake peddle switch or blown-out bulbs that reduce or eliminate the resistive load on the brake light circuit might cause the cruise control to become squirley when trying to activate it or trying to press the brake peddle to disengage the system.
Andy
Be aware replacing the stop light incandescent bulbs with LED bulbs will cause the cruise control to not work as it needs to see a resistive load on the circuit to work, LEDS do not provide this.
Knowing this, I would check that the tail lights are incandescent and are working properly as a faulty brake peddle switch or blown-out bulbs that reduce or eliminate the resistive load on the brake light circuit might cause the cruise control to become squirley when trying to activate it or trying to press the brake peddle to disengage the system.
Andy
Instructor
Joined: Jun 2001
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From: Alexandria, VA
If your car is a stick shift; depress the clutch all the way in, then put your foot behind the clutch pedal and push it up towards you. Sort of lifting the clutch pedal up. Sticks sometimes. Hope this helps you. Happened to me a few years back and our “ dear friend SW” taught me that trick. Still schooling us after all these years.
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If your car is a stick shift, depress the clutch in, then put your foot behind the clutch pedal and pull it up towards you. Lift the clutch pedal up. Sticks sometimes. Hope this helps you. It happened to me a few years ago, and our “dear friend SW” taught me that trick. Still schooling us after all these years.