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Home >> Merkur >> 1987 >> XR4Ti Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Turbocharger >> Testing >> OVERBOOST Warning Switch
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OVERBOOST Warning Switch

  1. Attach jumper wire between overboost warning switch and ground. If buzzer sounds, unit is functional, proceed to step 2).
  2. Remove overboost switch at the buzzer. Use an ohmmeter to verify continuity between buzzer connector (Brown/Yellow) and switch connection.
  3. Verify continuity between switch bracket and ground. If no continuity exists, disassemble and clean surface between bracket and body. Retest to confirm continuity.
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