Instrument Panel: Testing: Speedometer

1994 Saab 900 Base, StandardSECTION Speedometer

Ensure fuses No. 17 and 18 are okay. Raise and support vehicle. Turn ignition on. Rotate wheels by hand. ABS control module should send a pulsed A/C speed signal to terminal No. 7 (Gray/Green wire) of main instrument display No. 1, and terminal No. 5 (Orange/White wire) of main instrument display No. 2. If pulsed signal is not present, check for an open or short circuit.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.