How do you know if a light fuse is bad?
Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.
Can you use a test light to check fuses?
Always use the proper test light or voltage meter to check the vehicle’s fuses. Clamp the end of the test light or the negative cable of the voltage meter to a good ground close to the fuse box. Check one end of the first fuse. It should light the test light or show 12.6 volts or so on the voltage meter.
How do you test a fuse with a test light?
Poke the tip of the test light’s probe into 1 of the holes on a fuse to test it. Pick a fuse that you want to test. Hold the test light by the handle and stick the pointy metal tip of the probe into 1 of the 2 round or square holes on the fuse.
How to check a fuse at the home fuse box?
The rating usually is molded in the glass body, printed on a label on the fuse or stamped on the metal button on the bottom of the screw-in fuse base. Replace the blown fuse with a new fuse having the same amperage rating as the blown fuse. Screw the new fuse into the threaded socket that held the old fuse. Turn on house power.
What are the symptoms of a fuse problem?
One of the first symptoms of an issue with a fuse is loss of power to one or more of the vehicle’s functions or accessories. Fuses are installed in line of specific circuits in order to protect those circuits from potentially overloading.
What to do if you have a blown fuse?
Identify the circuit affected by the blown fuse. Go around the house turning lights on and off until you find the location where the lights don’t turn on. Turn off light switches and unplug electrical devices in that area before attempting a fuse replacement. Turn off house power at the main switch. Stand on the rubber mat in front of the fuse box.