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Home >> Mercedes Benz >> 1982 >> 300TD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Switches & Instrument Panels >> Testing >> Electronic Speedometer

Electronic Speedometer

  1. Remove screw and pull sender out of transmission tail housing. Turn ignition on. Place a large screwdriver blade across sender tip. Move blade quickly off and on sender. Speedometer needle should move slightly. If not, remove instrument cluster and unplug connector at back of cluster.
  2. Connect negative lead of voltmeter on pin 3 and positive lead on pin 5. Repeat test of sender. If voltage is indicated, speedometer is defective. If no voltage, replace sender and harness
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