What causes a fuse to keep blowing?

What causes a fuse to keep blowing?

First, and most commonly, when too many lights or plug-in appliances draw power from the circuit, it can overload the capacity of the fuse and cause the metal ribbon inside the fuse to melt through. A mis-wired lamp, for example, can cause a short circuit and blown fuse if it is plugged into an outlet.

What is the reason for frequent blowing of fuse after motor running some time?

Fuses blow because the fuse element gets too hot, and usually that is just caused by excess current. Occasionally they will blow with a combination of high normal current plus heat from poor connections.

Can I replace a fuse with a higher amp?

CAUTION! Never replace a blown fuse with a higher-amp fuse. Always replace the fuse with one with the specified amp rating. You may install the next-smaller-rated fuse to get you by in a pinch until you can purchase a replacement.

Why does my 10 amp fuse keep blowing?

The only reason a fuse will “blow” is because of a short circuit. That is a point where a wire connects directly to a ground and more current tries to pass through the wire than it is designed to handle. At that point the fuse will blow to keep the wiring from being damaged.

How can you tell if a plug fuse is blown?

Remove the fuse from its holder. In some cases you may need a small screwdriver to unscrew the fuse holder cap. Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.

How do you know if a plug fuse is blown?

What causes the fuse to blow on a fuel pump?

I would start at the fuel pump itself. If the fuse blows as soon as you turn on the key, undo the connector at the tank to the pump and put in a new fuse. Try it again, if the fuse pops then your short is before that point likely a chafed wire on the body. If the fuse stays good then the problem is in the pump harness or the fuel pump itself.

Can a fuel pump overload cause a problem?

If not, check the other loads on the fuel pump circuit as those other loads could be causing the problem (the overload). To check that refer to wiring diagram in Factory Service Manual.

What causes fuel pump to draw more current than intended?

There is also the possibility of a physical (mechanical) restriction in the fuel pump tubing, filter and/or pick up causing the motor to overload and draw more current than intended. That’s why you should measure the actual current draw of the pump in normal operation to rule that out.

What could cause fuse to keep blowing from fuel pump Chev?

In April I replaced a fuel pump in my S10. When they replaced it , it blew a 20 amp fuse. They put in new fuse and it ran fine till this week. 5 months later. The fuel pump was bad and was replaced under warranty. It continues to blow fuse and they can’t figure out what the problem is. Any suggestions? My car has 160000 miles.

Why is my fuel pump relay outside the fuse box?

If it’s located inside the engine bay, which can get hot from the engine’s heat, the heat can impede the relay’s performance. In addition, in the rare cases where you will find the relay placed in the engine bay but outside the fuse box, it will be exposed to heat plus dust and dirt.

How do you clean a fuel pump relay?

Since any debris will affect the fuel pump relay’s performance, you should regularly inspect and clean it when necessary. The fuel pump relay is an electrical car part, thus be extremely careful when handling a relay. First, take off the relay and use the blower to blow off dirt and dust for about 1-2 minutes.

If not, check the other loads on the fuel pump circuit as those other loads could be causing the problem (the overload). To check that refer to wiring diagram in Factory Service Manual.