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Test 73E - Shorted Parking Brake Circuit

NOTE: Perform TEST 73A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  . For wiring schematics, see WIRING DIAGRAMS  in this article. Perform TEST VER-1 - VERIFICATION PROCEDURE  after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Check and adjust brake fluid level as necessary. Disconnect parking brake switch connector. Connector is located above brake pedal bracket. If BRAKE warning lamp does not illuminate, replace parking brake switch. If BRAKE warning lamp illuminates, go to next step.
  2. Disconnect brake fluid level switch connector. Brake fluid level switch connector is located at brake fluid reservoir. If BRAKE warning lamp does not illuminate, replace brake fluid level switch. If BRAKE warning lamp illuminates, go to next step.
  3. Turn ignition off. Disconnect instrument cluster Gray connector. Using scan tool in ohmmeter mode, measure resistance at terminal No. 6 (Gray/Black wire) on instrument cluster Gray connector. If resistance is 5 ohms or greater, repair or replace instrument cluster as necessary. See appropriate INSTRUMENT PANEL article in the ACCESSORIES & ELECTRICAL section. If resistance is less than 5 ohms, go to next step.
  4. Disconnect ignition switch connector. See Figure . Using scan tool in ohmmeter mode, measure resistance at terminal No. 6 (Gray/Black wire) on instrument cluster Gray connector. If resistance is less than 5 ohms, repair short to ground in Gray/Black wire. If resistance is 5 ohms or greater, replace ignition switch.
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