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Temperature Gauge Test

CAUTION: In the following tests, turn ignition off before gauge pointer reaches "H" mark. Failure to turn ignition off before pointer reaches "H" mark may damage gauge.
  1. Turn ignition on. Check fuse No. 13 (15-amp) in underdash fuse/relay block. Turn ignition off. Disconnect and ground coolant temperature gauge sending unit electrical connector. Turn ignition on. Ensure temperature gauge pointer moves towards "H" on gauge.
    CAUTION: Turn ignition off, before pointer reaches "H".
  2. If pointer does not move, check for open Yellow/Green wire to sending unit. See WIRING DIAGRAMS . Repair as necessary. If circuit is okay, replace temperature gauge. If pointer moves towards "H", circuits are okay. Test temperature gauge sending unit. See TEMPERATURE GAUGE SENDING UNIT TEST.
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