Sylvie Willis
The 1999 Ford F250 is a popular diesel truck, but some owners have reported issues with the fuel pump fuse blowing. This can be caused by a short in the wiring leading to the fuel pump or a faulty fuel pump. In the power distribution box, fuse #19 (20 amp) is for the fuel pump and PCM. Disconnecting the fuel pump and cranking the engine can help diagnose the issue. The fuel pump relay is located in the under-hood fuse panel on the driver's side.
| Characteristics | Values |
|---|---|
| Year | 1999 |
| Model | F250 Diesel |
| Fuse Number | 19 |
| Fuse Amp Rating | 20A |
| Fuse Location | Power distribution box in the engine compartment |
| Cause of Blown Fuse | Short in wiring leading to the fuel pump or a bad fuel pump |
| Additional Information | Fuse #30 in the interior fuse panel may also blow due to a shorted fuel heater |
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What You'll Learn
The fuel pump relay is located in the under-hood fuse panel on the driver's side
If you are looking for the fuel pump relay in your 99 F250 Diesel, it is located in the under-hood fuse panel on the driver's side. This is the fuse box under the hood of your truck, and the fuel pump relay is in position 32.
The fuel pump relay is responsible for providing power to the fuel pump. If you are experiencing issues with your fuel pump, it is important to check the relay to ensure it is functioning properly.
One common issue with the 99 F250 Diesel is a blown fuse in the fuel pump circuit. This can be caused by a short in the wiring leading to the fuel pump or a faulty fuel pump. If you are experiencing a blown fuse, it is recommended to disconnect the fuel pump and crank the engine to see if the fuse blows again. This will help you determine if the issue is with the wiring or the fuel pump itself.
If the fuse blows again with the fuel pump disconnected, then the issue is likely a short in the wiring. In this case, you will need to inspect the wiring for any signs of damage or abrasion, as this can cause a short circuit.
On the other hand, if the fuse does not blow with the fuel pump disconnected, then the issue is likely a faulty fuel pump. In this case, you may need to replace the fuel pump to resolve the issue. It is recommended to consult a qualified mechanic or a Ford specialist to diagnose and resolve any issues with your fuel pump or electrical system.
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The 30-amp fuse keeps blowing
To troubleshoot the issue, you can try disconnecting the fuel pump and cranking the engine to see if the fuse trips. Additionally, you can check for any signs of diesel leakage from the filter housing and address that if necessary. If the problem persists, it is recommended to consult a certified mechanic who specializes in Ford vehicles or diesel engines. They can help diagnose and resolve the issue to ensure the safety and proper functioning of your vehicle.
It is important to address a blown fuse promptly to prevent further damage and ensure the vehicle's electrical system operates correctly. A blown fuse can indicate an underlying problem that needs to be identified and repaired. In some cases, it might be necessary to replace certain components, such as the fuel pump or fuel heater, to resolve the issue.
Additionally, it is worth noting that the fuse box layout and specific causes may vary depending on the exact model and configuration of your 99 F250 Diesel. Consulting the vehicle's manual or seeking advice from a Ford specialist can provide more precise information tailored to your specific vehicle. Taking proactive measures to address the blown fuse will help ensure the reliability and safe operation of your truck.
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The fuel pump relay is in the dash fuse box
If you are looking for the fuel pump relay in your 99 F250 diesel, it is located in the dash fuse box. More specifically, it is the third square relay from the firewall on the fender well side of the fuse box.
The fuel pump relay is located in the dash fuse box for the 99-01 7.3 truck models. However, for the 02-03 7.3 models, the fuel pump relay is located in the under-hood fuse box on the driver's side.
If you are experiencing issues with your fuel pump, it is important to check for any blown fuses in the dash fuse box. A blown fuse in the power distribution box, specifically fuse #19, could indicate a problem with the fuel pump or a short in the wiring leading to it.
Additionally, if your 99 F250 diesel is blowing a 30-amp fuse, it may be due to an internal short in the fuel pump or a wire shorting out near the fuel pump connector. It is recommended to disconnect the fuel pump and crank the engine to diagnose the issue further.
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The fuel pump fuse is tripping
If the fuel pump fuse on your 1999 Ford F250 Diesel keeps tripping, there are several possible causes. Firstly, it is important to determine whether the fuel pump is the only device on the fused circuit. If other devices are connected, they could be causing an overload and tripping the fuse. To check this, refer to the wiring diagram in the Factory Service Manual.
If the fuel pump is the only device on the circuit, the issue could be related to the fuel pump itself. A faulty fuel pump may draw more current than intended, causing the fuse to blow. To diagnose this, you can use a volt ohmmeter to measure the current draw of the pump and compare it to the factory-specified limits.
Another possible cause could be a restriction in the fuel pump tubing, filter, or pickup, which can also lead to the motor overloading and drawing excess current. To rule this out, measure the actual current draw of the pump during normal operation.
If the fuse blows immediately after replacement, you can try removing the power wire from the fuel pump and then replacing the fuse to see if it blows again. If it doesn't, the issue may be related to the pump or a wiring problem.
In some cases, the issue may be related to the fuel filter. If the filter is blocked, it can increase the load on the motor, leading to the fuse blowing. It is recommended to check if the fuel filter has been recently replaced or serviced.
If you are unable to diagnose the issue yourself, it is advisable to consult a certified technician who can help identify and resolve the problem.
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The fuel pump was weak
The fuel pump fuse is located in the power distribution box, also known as the central junction box, in the engine compartment. Specifically, it is fuse #19 (20 amp) in the fuse box.
If you are experiencing issues with your fuel pump, such as a blown fuse, there are several potential causes. One possibility is a short in the wiring leading to the fuel pump. This could be due to a wire rubbing against a fuel line, causing it to short out and blow the fuse. Another potential issue could be an internal short within the fuel pump itself. This can strain the pump and cause it to pull excess amps, leading to a blown fuse.
In some cases, the fuel heater may also be the culprit, as it can short out and blow the fuel pump fuse. Additionally, the fuel bowl heater could be the cause, as it may be filling up the fuel bowl very slowly, indicating a weak pump.
To diagnose the issue, it is recommended to disconnect the fuel pump and crank the engine to see if the fuse trips. If the fuse does not blow, then the problem lies with the fuel pump or its associated wiring. In this case, you may need to replace the fuel pump with a new one, such as a Bosch pump, and ensure that the fuel pickup is clear of any debris or clogging.
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Frequently asked questions
The fuse for the fuel pump is located in the under-hood fuse panel on the driver's side. It is the number in the 32 position in the picture of the fuse box itself.
A blown fuse in a 99 F250 Diesel could be due to a short in the wiring leading to the fuel pump or a faulty fuel pump. It could also be caused by a wire close to the fuel pump connector shorting out due to contact with a fuel line.
The fuse number for the fuel pump in a 99 F250 Diesel is #19 (20 amp) in the power distribution box located in the engine compartment.
