Re: 51 Packard 250 Headlights are dim

Posted by Tim Cole On 2021/10/3 12:16:34

The dipper switch is probably shot. If it gets warm with the headlights on there is a bad connection thereof. Next thing you can do is check for resistance in the wiring. Connect a voltmeter in parallel from the battery to the power terminal at the bulb. If you have more than .4 volts you have a problem. Good wiring and switches will be around .2 volts. Great wiring will be near zero. Connect the voltmeter from the ground pin on the light to the negative on the battery. The voltage there should be near zero. Use a thin piece of wire or a pin to back probe the headlight terminal. All of these tests are done with the headlights on. You may want to invest in a decent battery charger for this kind of work as well.