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THERMO-Time Switch: Volkswagen

  1. Ensure engine temperature is below 95°F (35°C). Disconnect electrical connector at cold start valve. Disconnect and tape ignition primary connector wire from terminal 1 of ignition coil to prevent engine starting.
  2. Attach test light to switch terminals and operate starter. Light should glow from 2-11 seconds at temperatures ranging from -4°-104°F (-20°C-40°C). If light does not glow or perform as described, check wiring harness and replace switch. Test lamp should not glow at temperatures above 104°F (40°C).
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