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Home >> Mazda >> 1977 >> GLC Base, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition Timing Control >> Testing >> Vehicle Speed Switch

Vehicle Speed Switch

  1. Connect voltmeter to distributor connector. Hook lead to Green/Red wire terminal. Block front wheels, raise rear of vehicle, and support with safety stands.
  2. Start engine and slowly increase vehicle speed. Current should stop flowing between 41-43 MPH. Slowly decrease vehicle speed. Current should stop within 3 MPH of initial current speed.
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