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Except ECHO, RAV4 & Highlander

  1. Disconnect combination switch connector. Connect fused jumper wire between battery voltage and terminal No. 16 (switch-side). Connect fused jumper wire between ground and terminal No. 2. See Figure. Connect DVOM positive lead to terminal No. 7 and negative lead to terminal No. 2.
  2. Depress washer switch and monitor DVOM voltage readings. On Camry, Camry Solara, Celica, Sienna, Tacoma and Tundra, readings should change from zero volts to battery voltage within one second of depressing washer switch. After switch is released, readings should change from battery voltage to zero volts in about 25 seconds (3 seconds on Celica, MR2, Prius, Sequoia, Sienna, Tacoma, Tundra and 4Runner). If readings are not as specified, replace wiper/washer switch. See FRONT WIPER SWITCH  under REMOVAL & INSTALLATION.
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