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  1. jwhinerman

    increase pull voltage on 12volt automotive relay?

    Hello, I have a situation with headlamps in an autombile. When the car is running , and the headlight switch is in the off position, the ecu sends 9volts to the headlamps to dimly light them during the day. When the headlamp switch is turned on, the voltage increases to the full 12 or 14...

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