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Test TC-82B - Speed Control Power Relay Circuit, Or S/C 12V Driver Circuit

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION in SELF-DIAGNOSTICS section in this article. For wiring diagram, see WIRING DIAGRAMS - 2.7L article.
  1. Using an ohmmeter, check resistance of speed control brake switch output circuit between brake switch connector and speed control servo 4-pin connector. See SPEED CONTROL SERVO CONNECTOR WIRE IDENTIFICATION table and BRAKE SWITCH CONNECTOR WIRE IDENTIFICATION table. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open brake switch output circuit. Perform TEST VER-4A.
  2. Check brake switch adjustment. See appropriate DISC & DRUM article in BRAKES section. If brake switch adjustment is okay, replace brake switch. Perform TEST VER-4A. If brake switch adjustment is not okay, adjust brake switch as necessary. Perform TEST VER-4A.
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