ASSUME ing that the bulbs are both burnt out, then C H E C K the voltage with a cigarette lighter system voltage monitor. I keep harping on this, cause its SOOOOOOO inexpensive to monitor your charging system WHILE operating the car. Fuses only limit excessive current and are not for protection the lamp filaments. Enjoy, Woody See walmart

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Equus Innova 3721 Battery and Charging System Monitor

For use with 12V outlet
LCD display
Head pivots for easy viewing
Online
$16.99
•
97¢ shipping
•
Free shipping to store