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Test 73D - Open Parking Brake Switch Circuit

NOTE: For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER  section in this article. Perform TEST VER-1  VERIFICATION TEST after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Turn ignition off. Disconnect instrument cluster Gray connector. Remove and inspect BRAKE warning lamp. Replace lamp if necessary. If lamp is okay, depress parking brake. Place gear shift lever in Drive. Go to next step.
  2. Using scan tool in ohmmeter mode, check resistance of instrument cluster Gray connector terminal No. 6 (Gray/Black wire) while cranking engine. If resistance is less than 5 ohms, repair or replace instrument cluster as necessary. See INSTRUMENT PANEL article. If resistance is 5 ohms or greater, go to next step.
  3. Disconnect ignition switch connector. See Figure . Using an external ohmmeter, check resistance of Gray/Black wire between instrument cluster Gray connector terminal No. 6 and ignition switch connector terminal No. 7. If resistance is 5 ohms or greater, repair open Gray/Black wire. If resistance is less than 5 ohms, replace ignition switch.
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