The sole purpose of the fuse box in your car or van is to protect every electrical circuit in the vehicle. There are a number of circuits in your vehicle including the main computer, the engine, the transmission as well as components such as the lights and windscreen wipers. On occasion, a relay or fuse can blow, which in itself is a quick fix, but if replacing the relay or the fuse does not rectify the issue then the problem may be the fuse box itself.
Although sounding like a daunting task, if you have some basic automotive knowledge and some standard tools such as a socket set and screwdriver then it’s a relatively simple task.
Here we will talk you through the steps…
Making sure the engine is turned off, disconnect both the positive and negative connections on the car battery. For safety, wrap both cable ends with a rag to ensure no metal contact.
Locate your vehicle’s fuse box. The fuse box is normally located in either the engine compartment, in the driver’s side foot well or in the glove compartment. If you are struggling to locate the fuse box then check your owner’s manual or have a search online.
Remove the lid and check that it has an illustrative diagram of the fuses within the box. Again if there is no diagram check your owner’s manual or search online.
The fuse box will be attached to the main battery supply by red cables and these need to be disconnected before you are able to begin removing the fuse box from its housing. These cables may be visible when you remove the fuse box lid or they may be hidden behind the fuse box itself and will only become visible once you begin to remove the fuse box.
As you remove the fuse box from its housing and disconnect it from the main battery supply, ensure to label any cables and connections so you can easily reconnect them to the new fuse box. There will be a number of connections to the fuse box and these all need to be carefully removed and labelled appropriately.
Once all the connections have been removed you should now able to remove the fuse box fully from its housing.
Place the old fuse box next to the new fuse box and check that the relay and fuse arrangement is exactly the same. If your new fuse box does not come with relays and fuses then transfer them from their position in the old fuse box into the corresponding position in the new fuse box.
Now you can begin to reconnect the cables and connections to the new fuse box, following the labeling that you applied earlier.
Reattach the main battery cables and affix the fuse box back into its housing.
Reconnect the positive and negative connections on the car battery and start-up your vehicle.
Hopefully any problem will now be rectified!
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