Car Fuses and Wiring
Ford Windstar
Jeep Grand Cherokee Laredo

Can a fuse appear to be good but in actual fact be blown?

757677

Top Answer
User Avatar
Wiki User
Answered
2015-07-15 21:18:36
2015-07-15 21:18:36

Yes

I have seen several fuse that appear ok, and in fact are defective.

The best way to test, is with a computer safe test light, there not cheap but if you want to get serious about auto electric you need one.

To test fuses, you are generally safe with the cheap kind.

1) Plug in or clip on your test light. 2) Test your test light against a known good source for voltage. 3) Turn on the ignition switch. 4) Probe both sides of your fuse, the results should be the same. Note that one or two may be cold on both sides (or negative if you have a computer safe tester) They generally power the interior lights. 5) If you find a fuse that is cold on one side and hot on the other, you have found the monster. 6) Replace it with the same type and size.

IF all tests well and you have glass fuses, test the metal clip on both sides that it clips into. They may require cleaning, and careful bending from water/ rust damage. If you have plug in fuses, check the integrity of the fuse holder.

I have seen all types and sizes of fuse, especially glass, that appear good, but are blown.

Relentless

Best way to check a fuse is take it out of the circuit and test its resistance. A good fuse will have very low resistance (less then 1 ohm). A bad fuse will measure "Overload" on your meter. You can get a cheap meter from and local hardware store for ten bucks. Even bring the fuse with you. The guy at the store will probably check it for free for you. Good luck.

001
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
๐Ÿ˜‚
0

Related Questions


Remove the blown fuse. Replace it with a new fuse.

A fuse is a deliberate weak link which will be blown if there is a power overload. When you blow a fuse, take the blown fuse out and throw it away as you would a blown light bulb, and replace it with another fuse of the same type. * In the old-timey fuse boxes a penny could be substituted for a fuse, but a penny is too strong to be blown, and the next overload will burn the house down.

Either blown bulbs or blown fuse check for blown fuse first under hood in fuse box labled taillights

simply having a blown fuse would not cause the engine to run hot. But, it depends on what fuse is blown. a fuse blown for the cooling fans would make it run hot.

You know your car has blown a fuse if whatever the fuse is for suddenly quits working. For example if your radio is playing and for no reason quits it may be a fuse has blown.

Im 99% sure you have a fuse blown, its the parking lamps fuse. a fuse may be blown

The fuse is said to have 'operated'.

Blown fuse, defective relay, loose or corroded wiring.Blown fuse, defective relay, loose or corroded wiring.

Circuit Condition Created by a "Blown" FuseA blown fuse creates an "open" circuit condition. It's the same as opening a switch [turning a switch to the off position].

Unplug the refrigerator, remove the fuse and look at it. Typically the fuse will be dark in color, much the same as a blown light bulb.

A relay does not have a fuse. The circuit for the particular relay is fused. You can tell if the fuse is blown by testing it with an ohm meter.

Pull the fuse out and have a look at it and if the wire inside is broken then its blown

There are many ways to tell if a fuse is blown. The most obvious way of telling is if it doesn't work.

Remove the fuse and look at it. If you cannot tell if it is blown by looking at it then check it with an ohm meter.

If the fuse in a surge protector is blown it will not resume operation unless the fust is replaced.

set to resistance, if infinite, then fuse blown.

They visually identify which fuse has operated.

The DC current has to flow through the fuse to reach the radio. blown fuse = no power.

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.

More than likely the fuse has blown. Find the fuse for the air bag it may be labled "SRS" for suplementary restraint system. Pull the fuse to see if it has blown, there should not be any black in the middle of the fuse. If it is blown replace it with the same amperage fuse.

It COULD be a blown fuse. Check the fuse panel. It COULD by a blown flasher unit. If the fuse is OK, change the flasher.

I assume its because the something to do with electric doors dont work? Look for the fuse that is blown. You can tell with out removing the fuse by the visible link at the top edge of the fuse. If no visible link then blown fuse.


Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.