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Test 29A - Wiper Switch Power Supply

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  . Perform TEST VER-1 after each repair.
  1. Remove and inspect fuse No. 10 in junction block. See Figure . Junction block is located behind end cover, on left side of instrument panel. If fuse is blown, go to TEST 30A. If fuse is not blown, go to next step.
  2. Using DRB in voltmeter mode, check voltage on fuse No. 10 (Black/White wire). If voltage is more than 10 volts, repair open Black/White wire between fuse and relay. If voltage is less than 10 volts, go to next step.
  3. Disconnect ignition switch connector. Connector is located on upper part of steering column, behind trim cover. See Figure . Using DRB in voltmeter mode, check voltage on ignition switch connector terminal No. 9 (Red wire). If voltage is less than 10 volts, repair open Red wire. If voltage is more than 10 volts, go to next step.
  4. Using an external ohmmeter, check resistance of Black/White wire between fuse No. 10 and ignition switch connector terminal No. 2. If resistance is more than 5 ohms, repair open Black/White wire between fuse and ignition switch. If resistance is less than 5 ohms, replace ignition switch.
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