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Diamante DOHC

  1. Disconnect ECM connector. See ENGINE CONTROL MODULE (ECM) LOCATION  table under COMPUTERIZED ENGINE CONTROLS. Using DVOM, measure input voltage between terminal No. 24 and vehicle ground. Turn headlights on. Measure voltage. Turn headlights off.
  2. Turn defogger on. Measure voltage. Turn defogger off. Depress brake pedal. Measure voltage. Release brake pedal. If any measurement is less than battery voltage, check and repair malfunctioning circuit. See appropriate wiring diagram under WIRING DIAGRAMS article in this section.
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