Electrical Load Switch: DOHC
- Disconnect ECM connector. Using DVOM, measure input voltage between terminal No. 24 (Red/Green wire) and vehicle ground. Turn headlights on. Measure voltage. Turn headlights off.
- 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.