! have a 95 2500 Cummins. All of a sudden the headlights are not working. The tail lights work. i have no power to the headlights themselves. Should I look at the switch first or the dimmer switch. The light switch is a pull type, not the one that turns.

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I would look at the headlight switch. When I bought my 1995 Dodge the brights wouldn't work. It turned out to be the headlight switch. The factory runs the power through the switch instead of using relays which tends to melt the switch/wiring.