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A/C-Heater Control Switch

WARNING: This page is about a different car, the 1994 Mercury Tracer and 1994 Ford Escort. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove control panel. See A/C-HEATER CONTROL PANEL under REMOVAL & INSTALLATION. With A/C-heater switch connector disconnected, use self-powered test light or ohmmeter to test switch condition.
  2. To test blower circuit No. 1 position, connect self-powered test light between Blue/Yellow wire terminal and Black wire terminal. With blower switch in No. 1 position, continuity should be present. Continuity should not be present with blower switch in any other position. Replace switch if it does not test correctly.
  3. To test blower circuit No. 2 position, connect self-powered test light between Blue wire terminal and Black wire terminal. With blower switch in No. 2 position, continuity should be present. Continuity should not be present with blower switch in any other position. Replace switch if it does not test correctly.
  4. To test blower circuit No. 3 position, connect self-powered test light between Blue/Red wire terminal and Black wire terminal. With blower switch in No. 3 position, continuity should be present. Continuity should not be present with blower switch in any other position. Replace switch if it does not test correctly.
  5. To test blower circuit No. 4 position, connect self-powered test light between Blue/White wire terminal and Black wire terminal. With blower switch in No. 4 position, continuity should be present. Continuity should not be present with blower switch in any other position. Replace switch if it does not test correctly.
  6. To test blower on signal circuit, connect self-powered test light between Orange/Blue wire terminal and Black wire terminal. With blower switch in No. 1, 2, 3 or 4 position, continuity should be present. Replace switch if it does not test correctly.
  7. To test A/C switch circuit, connect self-powered test light between Blue/Yellow and Red/Yellow wire terminals. With A/C switch on, continuity should be present. Replace switch if it does not test correctly.
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