Why does the fuel pump fuse keep blowing?

Because the starter and the fuel pump are on the same circuit! DUH! To determine which circuit is the troublesome one, unplug the fuel pump relay, put a fresh fuse in the #8 slot and turn the key to start the car. If the car turns over, you most likely need a new fuel pump. If the fuse blows, you most likely need a new starter motor.

What happens when a fuel pump relay goes bad?

If the fuel pump relay has an issue while the vehicle is operating it will cut off power to the fuel pump, which will cause the engine to stall. A faulty relay may allow the vehicle to be restarted a short while later, while a completely failed relay will not.

What should I do if my motorcycle fuse keeps blowing?

Fuse keeps blowing help!! Hello, my motorcycle keeps blowing a fuse. I purchased the bike and took it to the shop and had the mechanics look at it, they tested it and told me the bike needs a fuel pump and a new battery and it would work fine.

What are the symptoms of a bad fuel pump?

The engine may still crank when the key is turned, however it will not be able to start due to lack of fuel. This symptom can also be caused by a wide variety of other issues, so having the vehicle properly diagnosed is highly recommended. 3. No noise from the fuel pump

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.

The fuse that is blowing is the one that operates the relay, not the pump circuit. – the relay always has power (key on) and the ECM switches the ground. Old school method I always use in these instances is replace the fuse with a higher amp re-setting fuse like on electric window motors or electric seats!

What causes a fuel pump to leak at the bottom?

Fuel System Leaks Most mechanical fuel pumps have a weep hole on the bottom of the unit. When the internal diaphragm leaks, fuel escapes through the weep hole to notify the vehicle owner of a malfunction. This is one of the more common fuel pump problems found in classic cars that are between 30 and 60 years old.

Where is the fuse on the fuel pump?

Everytime I turn the ignition on, I blow the fuse. The fuse is located in the slot marked ECMI. How do I find out if it is the pump, the relay, or anything else? I am assuming there is a short somewhere. I thought maybe I pinched a wire and am arcing out somewhere.

Can a fuel pump cause a no start condition?

CASE 1: If your fuel pressure gauge read 50 PSI or more as the engine cranked. This means that the fuel pump on your 4.3L, 5.0L, or 5.7L is OK and not the cause of your No Start Condition. The next step is to observe the fuel pressure gauge’s needle (after your helper stopped cranking the engine).

Why does my Chevy fuel pump keep failing?

The Chevrolet service bulletin states that the cause of the repeat failures is due to worn or damaged electrical connectors at the fuel pump assembly. When you get the Delco replacement parts it comes with a new connector on the fuel pump side.

Where is the connector on a Chevy fuel pump?

When you get the Delco replacement parts it comes with a new connector on the fuel pump side. The problem is the connector on the vehicle side of the harness. In the online Chevrolet repair manual I use, a Tech Tip states, the connector should be replaced with the fuel pump assembly.

When did the Chevy fuel pump come out?

It started on Chevrolet truck models from 1996 to 2003 model years, but has expanded to other models as the connector and pump assemblies are not aging well. In fact, I have a financially strapped friend with an 04 Silverado that now caries a heavy rubber mallet in the truck.

What happens when you replace the harness on a fuel pump?

Failure to replace the electrical connector on the harness side can cause voltage spikes across the new fuel pump. Over time this can damage the part. Replacement of the harness connector is a fairly simple operation and the parts are readily available from your GM dealer parts department.

Why does my fuel pump fuse keep blowing? Fuses are over current protection devices which means that you either have a short to ground (possibly intermittent) somewhere in the circuit or enough added resistance in the circuit that the current drawn by the pump is enough to blow the fuse.

How do I know if a fuse has gone?

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.

What does a 20 amp starter fuse do?

A look at a schematic shows this fuse (No. 8, 20 amp, hot all the time) provides power for for the starter solenoid through a separate starter relay. The problem should be one of 3 things.

What causes a fuse to short on a starter solenoid?

A look at a schematic shows this fuse (No. 8, 20 amp, hot all the time) provides power for for the starter solenoid through a separate starter relay. The problem should be one of 3 things. Intermittent short in the red wire to the relay or in the brown wire to the starter solenoid. Internal problem in the solenoid. Faulty starter relay.

Why does my Car start with 20 amp?

They think it might be the starter but are not sure. After getting the car to start once with a 25 amp fuse (vs. the called for 20) it started each time for them with the 20 amp back in place so it is hard to be sure. The questions are 1) Does this seem like it could be the starter or if not what might it be?

Why does the 20 amp fuse keep blowing?

A new 17.5 Briggs and Stratton engine. That engine had thrown a rod since then. So I have a rolling chassis with a blown engine. I didn’t try to figure out why the cadet was blowing the 20amp fuse. I had removed the engine from the Cadet and it was pretty much plug and play at putting it in the craftsman.

A look at a schematic shows this fuse (No. 8, 20 amp, hot all the time) provides power for for the starter solenoid through a separate starter relay. The problem should be one of 3 things.

What happens when you blow the 20 amp fuse?

The 12 volts power supply from that 20 amp fuse is distributed to more circuits than the start circuit. The electrical short / overload could be in any of those branches. When power branches like this, the branches have to be checked and disconnected to find the fault. Good luck in finding an electrician. It might be worth changing the starter.

Why does my car keep blowing the fuse?

Now it is back to blowing intermittently. They think it might be the starter but are not sure. After getting the car to start once with a 25 amp fuse (vs. the called for 20) it started each time for them with the 20 amp back in place so it is hard to be sure.

Why does my car keep blowing the starter fuse?

My car intermittently blows the starter fuse when starting. It started out doing it once every couple of months and would always start with a second fuse. Then it blew 5 fuses in a row and I had to have towed to a shop. The shop said they isolated the problem to the fuel pump and replaced it.

Can a 15 amp starter fuse be blown?

Fifteen amps may not be enough to blow the fuse on a one time deal but this repeated current surge due to the fan cycling on and off can weaken the fuse and eventually pop it due to heat.

How to diagnose a fuse that keeps blowing?

(EASY) DIAGNOSING A FUSE THAT KEEPS BLOWING, ELECTRICAL (SHORT CIRCUIT, NO START) / ARE YOU SAVED? – YouTube (EASY) DIAGNOSING A FUSE THAT KEEPS BLOWING, ELECTRICAL (SHORT CIRCUIT, NO START) / ARE YOU SAVED?

Where does the Black fuse go on a fuel pump?

The Black/red goes from the FI fuse to the switched contact of the Main Relay; the other side of the switch goes in Blue/black to the ECU and all the other things I listed. The Blue/black goes to the switched contact of the Fuel Pump Relay; the other side of the switch supplies the fuel pump on Pink/black. I hope that helps.

What should resistance be for fuel injection fuse to blow?

The FI fuse is 15A. Assuming the battery volts are 12 when the engine is off, the resistance in the circuit must be less than 12/15 = 0.8 ohm for the fuse to blow. So you are looking for a resistance to ground of less than that value]

Where are the fuses for the ignition switch?

In play from the ignition switch is the body control module, and fuses 14, 15, 17, and 23 of the junction block to the left of the steering wheel. I would first check to see if larger fuses are used for 14, 15, 17, and 23 to sell the car, If not, you may have a problem related to ignition, body control module, or associated wiring.

What are the symptoms of a faulty fuel pump relay?

1 Engine does not start. A common symptom of a faulty fuel pump relay is an engine that just refuses to start, even though the engine may still crank when the 2 Engine stalls. One of the most common symptoms of a failing fuel pump relay is an engine that suddenly stalls. 3 Loss of Power. 4 No noise from the fuel pump.

What are the symptoms of a bad fuel pressure regulator?

Another symptom of an issue with the vehicle’s fuel pressure regulator is fuel leaks. If the fuel pressure regulator’s diaphragm, or any of the seals fail, fuel leaks can occur.

Where is the fuel pump relay located in a car?

In most vehicles, the fuel pump relay can be located in the fuse box in the engine bay. The fuse box of the engine is usually a long black box which contains fuel pump relay along with various other fuses and relays.

Can fuel pump cause fuse to blow?

a locked up fuel pump would blow the fuse. also check at the fuel rail to see if the pump is working. it may have been a clogged line that burned up the first pump which in-turn burned the fuse. and if there is/was a clog then it probably clogged the injectors as well, if fuel is making it to the injectors then you might try running a high quality fuel system / injector cleaner .

Why does the fuel injection fuse blow?

The fuel injector fuse provides power to the injectors using splices therefore enabling one wire to feed 6 injectors. A shorted wire at any of these wires will blow the fuse.

Is there a fuel pump fuse anywhere?

Yes. Almost all vehicles have a fuse in the panel that controls the fuel pump/ECU. Look under the dash, next to the driver side foot panel. Look for ECM, ECU, or fuel. There is also a relay inside the engine compartment on the driver side on the top of the firewall by the hood.

What Fuse is the fuel pump fuse?

The fuel pump fuse is located to the right of the A.I.R. relay and to the left of the horn fuse. It is marked as the ECM-B fuse.

What are the symptoms of a bad fuel pump relay?

A bad fuel pump relay can cause many different symptoms. Here are the most common ones The fuel pump relay is an important component of the fuel system of your vehicle. The fuel pump relay gives the fuel pump power when it is time to build up fuel pressure in the rail.

What happens when a fuel pump goes bad?

The engine turns off if the combustion chamber’s fuel is inadequate or doesn’t have the proper pressure. The part that ensures none of this happens is the fuel pump, and it cannot work perfectly if the fuel pump relay develops any issues. A faulty fuel pump relay can also cause the engine not to start at all and be completely dead.

Where are the fuse panels on a Lincoln LS?

In this article, you will find fuse box diagrams of Lincoln LS 2000, 2001, 2002, 2003, 2004, 2005 and 2006, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Why is my Lincoln LS 3.9 engine not firing?

One evening I backed my car up about 10 ft. turned it off and about 15 minutes later started it and pulled it forward to where it had been. The next morning I could not start the engine. My local LM looked at it and informed me that the engine was turning over but not firing.

What kind of engine does a Lincoln LS have?

They put oil in each cylinder and started the car. They informed me that I needed to replace the engine (about $7,000 installed) and that they have had several Lincoln LS’s with this engine with the same problem at about the same mileage as mine. It is supposed to be a Jaguar engine according to them.

Is there a problem with my Lincoln engine?

Since a year has passed, now the car seems to be using a little oil, which is unusual for it. Occasionally now when the engine is started when hot, a cloud of white looking smoke can be seen behind the car. After than nothing.

Where is the fuel pump fuse box located?

The engine’s or the dashboard fuse box is usually a long black box containing a fuel pump relay and various other fuses and relays. For different vehicles, the fuel pump relays can be located in different places.

How many pins does a fuel pump relay have?

The fuel pump relay does often have 4 pins, and in this case, it is often easy. If your relay has more pins and not the same numbers mentioned here, you need to check a wiring diagram. Lift it and check under it for the numbers 30, 85, 86, and 87. If you locate these numbers, you can put the fuel pump relay back.

Where is the fuse block on a GMC Sierra?

The center instrument panel utility block is located underneath the instrument panel, to the left of the steering column. The underhood fuse block in the engine compartment on the driver’s side of the vehicle near the battery. Lift the cover for access to the fuse/relay block.

Why does the fuel pump fuse keep blowing?