Step by step repair guide on how to test and
repair a burned fuse holder. This article pertains to all cars.
Difficulty Scale: 4 of 10
Tool and Supplies Needed
- Wiring connectors
- Test light
- Protective eye wear and gloves
- Replacement fuse
Begin with the car on level ground, in park with the emergency brake on.
- Isolate the circuit in question, this
can be done by identifying the fuse in the power distribution center (PDC) or utilizing
a wiring schematic.
- Using a flashlight inspect the fuse for
signs of extreme heat, if heat is present the fuse holder in the panel has melted
which causes a connection problem. This condition occurs because fuses are subject
to vibration and moisture which causes high resistance which transfers into heat.
Step 3 -
There are two options at this point, replacing
the fuse panel, or locate the wires involved in the circuit by using a wiring schematic
and bypassing the fuse panel altogether using an independent fuse holder.
A car has many fuses, some protect a small system like a rear windshield wiper
while others protect major system circuits, like the engine management system. The
primary purpose of an electrical fuse is to help protect a circuit from damage in
the event of a short. A fuse is designed to break stopping the voltage flow in the
event of a power overload or short circuit. Each vehicle has several fuses that
are necessary to safeguard electrical circuits. An electrical circuit will always
fail at the point of highest resistance. Most of the time that point is the fuse
holder. If an electrical circuit fails, an electric window system (for example)
the first thing you should check is the fuse.
- A burned fuse holder is not always easy to detect, in this case remove the
fuse of the circuit in question and replace it with a new one. Next with the
key in the "ON" position move the fuse in and out of the fuse holder and note
the effected circuit such as electric windows. If the device starts working
while moving the fuse in and out, the fuse holder is burning and a repair is
Article first published 2016-02-03