If the fuse is bad, you can replace it and most ... a bad socket and probe the wiring with a simple 12-volt automotive test light. Turn off the light switch and remove the bulb again.

【LCD BACKLIT DIGITAL SCREEN&ILLUMINATION】Heavy Duty Fuse Tester with Highly ... and More Durable than Traditional Test Lights and Prevents the Car Computer Board from Burning Out.

Try plugging in the cigarette lighter - If you still have the cigarette lighter that came with your car ... use a test light to check for power, if you have one, or examine the fuse panel to ...