Pelican Parts Forums - ABS - 4WD - Speedo problem 911 C4

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ABS - 4WD - Speedo problem 911 C4

Periodically, the ABS and 4WD warning lights come on for a split second. As this problem has worsened, the brake booster warning beep also sounds and the speedo reading drops to zero.
When the fault clears, the lights all go out and the speedo recovers.
I also had a problem with Airbag and Seatbelt lights coming on - this was cured by following the steps detailed in the tech center re dry joints on the clock module connections.
I wondered if anybody had seen similar issues and if there is a common electrical path between the ABS/4WD warning lights and the speedo?

If your car is 91 up, the speedo is read from the left front abs sensor. Start there. Maybe pull it and clean it. They are magnetic.