Use a VOM meter. Set it to Ohms and touch one lead to each end, or in the case of an auto fuse, each "spade" connector..
Not while it is in the fuse holder. Pull it out and if you cannot look and tell if it is blown or not, test it with an Ohm meter.
you test it out
To test it effectively you have to disconnect one end to cut out feedback.
Use a test light, Hook up a test light to the ground post of the battery and check both sides of the fuse. If the light lights up on one side but not the other side the fuse is more than likely blown. If the test light lights up on both sides the fuse is good.
Or Use A 12 Volt Test Light And Check All The Fuses In The Box Until You Find The One That Does Not Light Up Your Test Light. While The Fuse Is In The Fuse Block, One Spade Of The Fuse Contacts The 12 Volt Power Side From The Battery, While The Other Spade Of Your Fuse Completes The Circuit Going To The Part Or Bulb Or The Dash Lights. If You Test One Side Of The Fuse And It Lights, Test The Other Side, it Should Light. If It Does Not Light On One Side That Means Your Fuse Is Blown. Lighting On One Side means You have Power To The Fuse, But To Complete The Circuit The Fuse Has To Pass The Power On To The Wire It Is Connected To. So If Both Terminals Do Not Light "BLOWN FUSE".
Just use a test lite and check them all.
Test it with an ohm meter.
You can buy a bunch of different fuses and a tester for about 12 bucks. No way to know for sure unless you test. Look inside fuse box for diagram. Test fuse either in the panel or out. Only way to be sure.
The Easiest way is 2 use a 12 volt Test Light.On older glass fuses-just touch both ends of the fuse & the test light should light on both ends if the fuse is good.The Plastic holder fuses(newer) have a small hole on the top of them 2 test. turn the key on & parking lights 2 do these test.
Hi,The fuse for the tail lights is in the fuse panel located on the passenger side of the dash. I believe it is labeled as fuse number 30 and should be a 15 amp fuse. There should also be power at both sides of the fuse at all times. You should test it with a test light or multimeter to check if the fuse is good.I have included a link that includes a diagram and pictures of where the fuses are located.Take Care, Greg
Under the hood there is a fuse box on the passenger side. The brake like fuse is located in that fuse box. It is fuse #13 (20amp). To test the fuse hit the horn, if the horn works then the fuse is good.
you should use a test light and touch it to each side of the fuse and make sure you ground the test light first. or you could pull the fuse and see if the metal piece inside of it is broken which would mean you would have to replace it.