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Switch Test: Tercel

WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1992 Toyota Tercel, 1992 Toyota Supra, 1992 Toyota Previa, 1992 Toyota Paseo, and 1992 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.
  1. To test defogger switch without timer, ensure continuity exists between terminals No. 1, 3 and 4 with switch on. See Figure. With switch off, continuity should exist between terminals No. 1 and 3. Check for continuity between terminals No. 5 and 6 (light bulb). Continuity should exist at all times. If continuity is not as specified, replace switch.
  2. To test defogger switch with timer, remove defogger switch. Using an ohmmeter, check for continuity between terminals No. 1 and 4. See Figure. If continuity does not exist, replace switch. Connect battery voltage to terminal No. 2, and ground terminal No. 3. See Figure.
  3. Connect 3.4-watt test light between terminals No. 2 and 6. Turn defogger on. Ensure test light lights for 12-18 minutes and then goes out. If switch does not operate as specified, replace switch.
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