Disconnect the positive battery cable, for added insurance. This device is not quite a fuse, but works rather like one. These fuses are wider than they are tall, and they come in two main types. Fusible links perform the same basic function as fuses, but they go about it in a slightly different way. Types of fuse The type and construction of fuses varies from car to car. This precaution will prevent you from being shocked while working with the wiring. This is why I asked before I tried to 'fix' the problem.
Should I put these fuses in? You need to know where it is, what type of fuses your box uses, and if your main switch works properly. About the Author Jeff Grundy has been writing computer-related articles and tutorials since 1995. This will remove any tarnish that may have formed and ensure a good contact with the spring clips. The diagram in manual lists a particular number for the main, battery fuse. One unique characteristic is that it doesn't lock. Place masking tape around the wire or wires and use a felt pen to mark them, according to their descriptors in the diagram.
. The fuse prevents that happening, because its thin wire will melt and break the circuit long before the cable itself can heat up and burn. However, if you are adding to a radio to a 1980s or newer model vehicle, it probably use the more familiar plastic, flat edge fuses. A car fuse box develops minor problems like blown fuses, dislocated fuses or impaction of grime and dust along the connectors. Problems that cause fuses to blow If you have multiple problems, something could be seriously wrong in your wiring harness or computer system.
If you own your car long enough, you can assume that at some point, one or more of your automotive fuses will blow. Among commonly-occurring car repair demands, changing the battery fuse is among the easier tasks. Brighten the caps of a new fuse with emery paper. Once you have your fuse tap, the only tools you really need to connect the car radio to the fuse box are a wire crimper tool and a utility knife. Most homes built before 1960 will have a fuse box, those built after have a circuit breaker box. The fuses are usually grouped in a box or on a panel with a cover.
Among car fuses, there is usually a main, battery fuse. When an electrical component stops working the fault may be in the component, in the electrical circuit or in the fuse that protects them. Look for any small wires that have nut and eyelet connections on the underside of the fuse box that require removal. Checking fuses Depending on the fuse design, it is sometimes possible to tell whether it has blown by holding it up against a light; a break in the wire inside may be visible. One rated at about 30-50 amps protects components wired through the ignition switch — flashers, wipers, heater-motor and instruments.
In other applications, the fusible link may be easier to get at and replace than the wiring it is designed to protect. The sudden loss of headlights because a fuse has blown can be dangerous, so such circuits may be protected by a thermostatic interruptor. For example, failure of an electrical component or damaged insulation on a cable can cause a short circuit, resulting in a sudden massive increase in current. Always replace a fuse with one of the same rating. The only other items you might need are a piece of 12-gauge electrical wire and a butt connector if the power wire from the radio is too short to reach the fuse box.
You can wrap the cloth over the tip of a screwdriver to clean the internal, hard-to-reach fuse holder surfaces. Use a socket and wrench to disconnect the negative battery cable from its post. Read the following guidelines, and if you think it still is relevant, message the mods to free it from the spam filter. Get to know where it is before anything goes wrong. In automotive applications, a fusible link is a length of wire that is than the wire that it is designed to protect. Look for a large red cable, or cables attached to the fuse box, which will be the main battery supply cables. Go to the box and place a dry rubber mat on the floor to stand on to create insulation for your body.
Replacing fusible links is often a more involved job than simply pulling a fuse, since they are typically bolted in place and are sometimes difficult to reach. The location is usually given in the car handbook. You can remove the suspected fuses with a plier. The fuses are sold in standard amperage or voltage readings. Additionally, if you have already inserted the car radio into the dash and secured it, you may have to remove it so you can access the power wire. A fuse tap plugs into the fuse box just like a normal fuse and has a wire with a crimp connector you can use to connect to the power wire from the car radio.