Jeremy Laukkonen is automotive and also tech writer for numerous major trade publications and also the creator of a popular blog and video game startup. A fan of EVs due to the fact that the at an early stage 2000s, he remains up-to-date top top the myriad facility systems that strength battery electric vehicles.
You are watching: Where is the cigarette lighter fuse located
What a puffy fuse watch like.Tydence Davis / Flickr / an imaginative Commons (CC by 2.0)
Cigarette lighter fuses, choose all auto fuses, blow once the circuit draws much more amperage than the fuse is designed to handle. If the cigarette lighter fuse is 15 amps, then a attract of much more than 15 amps will cause it come blow. If you replace it with an additional 15 amp fuse, and something top top the circuit is quiet drawing more than 15 amps, then the fuse will just blow again.
It might seem like the easiest solution would certainly be to simply replace the 15 amp fuse through a bigger fuse, yet this is actually an extremely dangerous. When the wiring in the cigarette lighter circuit may be capable of managing a little an ext than 15 amps, yes sir no guarantee that it actually is. And if the difficulty in her circuit is in reality some form of short, putting in a bigger fuse may reason the wiring to heat up come the point where it could melt or even cause a fire.
While you have the right to buy a circuit breaker together a direct replacement because that the fuse that keeps blowing, this is also a poor idea, especially if over there is a short in the circuit. These circuit breakers are useful in some applications and have certain diagnostic uses, yet using one to deliberately overload a cigarette lighter circuit is no recommended.
inspect for foreign Objects in Your tobacco Lighter Socket
There are a the majority of reasons for a tobacco lighter fuse to consistently pop, but one that the much more common, and also often overlooked, is the presence of a foreign object in the socket. Due to the fact that cigarette lighter sockets room designed so the the entire body the the metal cylinder is grounded, and the center pin is hot, that surprisingly straightforward to short the circuit.
Some vehicles have adjust holders, or catch-all trays, in the vicinity that the cigarette lighter socket, which makes it dangerously straightforward for a coin to fall in. If that happens, the coin may call both the grounded barrel and the hot pin within the socket and also cause a quick circuit.
Other steel objects, like paperclips, or even pieces damaged off from old phone call chargers, can additionally become lodged in a tobacco lighter socket. In some cases, you may discover that such an item doesn’t cause a short circuit all the time, yet inserting the cigarette lighter or a 12-volt power adapter reasons the fuse to punch immediately.
If friend look within your cigarette lighter socket through a flashlight and also see a international object, yes sir a great chance that removing that will solve your problem. Just to it is in safe, you have to make sure that you remove the tobacco lighter fuse before reaching inside the socket to remove the foreign object. You have the right to then download a new fuse and also check to see if the still blows.
inspect the machine You want to strength From the tobacco Lighter
There is a difficult limit ~ above the present that friend can attract from a cigarette lighter socket or any kind of 12-volt accessory socket. If the machine that you want to strength up via your cigarette lighter draws more amperage, then it’s a simple fact that the fuse will blow every time friend plug the in.
In most cases, tobacco lighter circuits use 15 amp fuses, yet you can check the fuse box in your car to be sure. You’ll then desire to inspect the device you’re make the efforts to plugin to see exactly how much amperage it draws. Mobile chargers are usually draft to work with tobacco lighter sockets there is no blowing a fuse, however other devices, favor cigarette lighter inverters, can conveniently overload the circuit.
Even if her 12-volt device, charger, adapter, or inverter is designed to attract less than 15 amps, the still precious inspecting the plug. If the plug is broken, worn out, or has actually something stuck on it, plugging the in may reason a straight short in between power and ground inside the tobacco lighter socket.
If you’ve only ever tried come plug one thing right into your cigarette lighter, the may also be precious trying a different 12-volt charger or adapter simply to dominance out a problem with the one the you have been using. Or girlfriend could likewise use an ohmmeter to inspect for one internal quick in your adapter.
troubles With the tobacco Lighter Circuit
Most that the time, a tobacco lighter fuse that keeps blowing is led to by some outside problem. However, that always possible that you can be dealing with an internal problem. If the fuse always blows without even plugging something in, and you have actually verified the there isn’t a international object inside the socket, then there is a difficulty somewhere else in the circuit.
In order to totally rule the end a problem with the socket itself, you have the right to remove it see if the fuse blows. This is one application whereby a circuit breaker fuse can actually it is in useful, due to the fact that blowing fuses over and also over again to narrow under the resource of your difficulty could end up being expensive.
This form of difficulty will additionally be much easier to diagnose if you room able come track under a wiring diagram for your certain vehicle due to the fact that that will display you any components other than the cigarette lighter the are additionally on the very same circuit. Disconnecting every of these materials in turn, if there room any, may also be advantageous in identify the source of your short.
Another likely reason for this type of difficulty is a shorted out strength wire. That essentially way that the strength wire the connects to your tobacco lighter may have actually rubbed or burned through and come into contact with steel somewhere behind the dashboard. You have the right to look for this form of quick by checking for continuity in between the tobacco lighter power wire and ground.
Locating a quick Circuit
Depending top top your certain vehicle, it may be exceedingly an overwhelming to actually discover the ar of this form of short. The short may be situated in a daunting to reach a place that girlfriend won't be able to find without removing your radio, HVAC controls, or also the dashboard.
While over there are devices for locating shorts in automotive applications, this isn't the kind of tool everyone will have laying around. In part cases, the simplest solution may be to just leave your tobacco lighter fuse the end permanently and run a new power cable to the cigarette lighter socket.
Rewiring a bad Cigarette Lighter Circuit
If you elect to run a brand-new power cable to the tobacco lighter socket, it’s very important to use an proper wire gauge. The also an essential to download an ideal fuse, in the occasion that you decide to go this route. In some cases, girlfriend may have the ability to use a blank spot in her fuse box, and also in various other cases, the only option is to operation a power wire straight to the battery.
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In both of these situations, failing to usage an appropriate fuse could easily result in an electric fire. And in any kind of case, running a brand-new power wire need to be your last will after you have ruled the end every various other potential factor for your tobacco lighter fuse to blow repeatedly.