How to test car fuses?

The fuse box under the hood may be in different locations depending on the vehicle.

In this particular vehicle, it is on the driver’s side near the battery.

Some vehicles also have a secondary fuse box inside the cabin or even in the trunk.

The under-hood fuse box primarily controls engine-related functions, while the interior fuse box often handles dashboard lights, cigarette lighters, and other interior electronics.

Locate the fuse box and carefully remove the cover.

The cover is typically held in place by clips—release them gently.

The fuse junction box contains both fuses and relays, which control different electrical components of the vehicle.

Set your multimeter to continuity mode.

If you have fine probe leads, insert them into the fuse terminals to check for continuity.

Test each fuse one by one to confirm they are not blown.

Check the fuse box and surrounding connections for green or white residue.

If corrosion is present, it can cause intermittent connection issues.

Use an electronic cleaner spray to remove corrosion and residue.

The cleaner evaporates quickly and is safe to use.

For tougher residue, use a soft brush (like a toothbrush) to clean the affected areas.

Make sure all fuses and relays are seated properly.

Double-check that no moisture or debris is affecting the fuse connections.