Replacing The Fuel Pump In A 2009 Cadillac Dts

If your 2009 Cadillac DTS is not starting, you may need to replace the fuel pump. Before replacing the pump, check the fuses and relays. If the relay is burnt out, you may need to replace the rear fuse box. You can also try replacing the relay again or having someone start the car while you touch the relay to see if you can feel it clicking. If you need to replace the fuel pump, you can purchase one from a dealership or from Advance Auto Parts, which offers fuel pumps starting at $8.49. The labour cost for replacing a fuel pump is approximately $650.

Check the fuse panel connection

To check the fuse panel connection in your 2009 Cadillac DTS, you'll first need to locate the fuse panel. Modern cars typically have two fuse boxes: one under the hood, and the other inside the cabin. You can find the fuse map in the owner's manual, or on the fuse box cover.

Once you've located the fuse panel, you can then proceed to check the fuses. The easiest way to do this is to pull the fuse out and check it visually. You can find the directions for this in your vehicle's owner's manual.

• Turn the key to the OFF position.
• Before pulling the fuse, mark its position so you can install it into the same spot.
• Use the fuse removal tool located in the fuse box or in the fuse box cover to pull out the fuse.
• Inspect the fuse for any signs of damage. A blown fuse will have a melted thin metal conductor inside.
• If the fuse is blown, replace it with a new one of the proper type and amp rating.

You can also check a fuse using a multimeter. Here are the steps:

• Turn the equipment off and remove the fuse.
• Turn the multimeter on and set it to measure continuity or ohms.
• Touch the positive and negative leads of the multimeter together and check the reading.
• Place one lead of the multimeter on each end of the fuse and check the reading.
• If the multimeter beeps continuously, the fuse is functioning properly.
• If there is no reading or the meter says "Open Loop" or "OL", the fuse is blown and needs to be replaced.

If you are experiencing issues with your fuel pump, it is important to check the fuse panel connection and ensure that the fuses are functioning properly.

Check the relay

To check the relay of your 2009 Cadillac DTS, you can start by locating the fuse box. The fuse box is often located in the engine bay, and this is where you will find the fuel pump relay.

Firstly, you should check the fuse box to ensure that the fuse for the fuel pump is not blown. If the fuse is blown, you will need to replace it. If the fuse is not the issue, you can then try swapping the relay with another relay in the panel to see if that resolves the problem.

If you have recently replaced the fuel pump relay, it is worth checking that you have been provided with the correct relay for your vehicle. You can do this by referring to your vehicle handbook or by contacting the dealership.

If the fuel pump relay is not the issue, the problem may lie with the fuel pump control module, which is located in the driver's side fender. You can check if there is voltage at the control module by using a multimeter. If there is no voltage, there may be a fuse for this module that needs checking.

Check the rear fuse box

To check the rear fuse box of your 2009 Cadillac DTS, you must first locate the fuse box. The fuse box is located under the rear seat of the car.

Once you have located the fuse box, you can proceed to check the fuses. Here is a step-by-step guide:

• Identify the fuse that needs to be checked: In the case of a fuel pump issue, you will need to check the fuses related to the fuel pump, which are located in the Rear Underseat Fuse Block. For a 2009 Cadillac DTS, these include fuses №26 (Cigarette Lighter, Auxiliary Power Outlet) and №31 (Accessory Power Outlets).
• Remove the fuse: Use the fuse puller tool located in the fuse box to remove the fuse. You can also use a pair of needle-nose pliers if you don't have the tool.
• Inspect the fuse: Look at the metal wire inside the fuse. If the wire is intact, the fuse is good. If the wire is broken or melted, the fuse is blown and needs to be replaced.
• Test the fuse (optional): If you're not sure if the fuse is blown, you can use a multimeter to test it. Set the multimeter to measure resistance (ohms) and touch the probes to the metal caps at the end of the fuse. If the fuse is good, the multimeter will display a low resistance reading. If the fuse is blown, the multimeter will display a high resistance or infinite resistance reading.
• Replace the fuse if necessary: If the fuse is blown, replace it with a new fuse of the same amperage rating. Make sure to address any underlying issues that may have caused the fuse to blow, such as electrical shorts or overloaded circuits.

It is important to note that fuse boxes can vary depending on the year of the Cadillac DTS. The information provided above is specific to the 2009 model year. Additionally, if you are uncomfortable or unfamiliar with automotive electrical systems, it is recommended to consult a qualified mechanic or automotive electrician.

Check the fuel pressure

To check the fuel pressure of your 2009 Cadillac DTS, you will need a fuel pressure gauge. This gauge will need to be connected to the fuel rail test port, which is located on the fuel rail, which is on the engine.

Once you have connected the fuel pressure gauge, you will need to turn the ignition on, but do not start the engine. The fuel pressure gauge should read between 55-62 psi. If the pressure is lower than this range, there may be an issue with the fuel pump or the fuel pressure regulator.

If the pressure is within the correct range, try starting the engine. If the pressure drops below 50 psi when cranking the engine, there may be an issue with the fuel pump or fuel filter.

It is important to note that working on fuel systems can be dangerous due to the risk of fire, so it is recommended that you wear safety goggles and have a fire extinguisher nearby.

Check the fuel relay and fuse

To check the fuel relay and fuse on your 2009 Cadillac DTS, you'll need to locate the fuse box and the fuel relay within it. Here's a step-by-step guide to help you through the process:

Locating the Fuse Box:

• Open the rear door of your Cadillac DTS and remove the rear seat bottom cushion. This will give you access to the fuse box, which is usually located in the rear body of the vehicle.
• Look for a black box with a removable cover. This is the fuse box, and it houses the fuses and relays for various electrical systems in your car, including the fuel system.

Checking the Fuel Relay and Fuse:

• With the fuse box cover removed, locate the fuel pump relay. It should be labelled as such, and it will be in a different format than the fuses.
• Inspect the fuel pump relay for any signs of burning, melting, or corrosion. Pay close attention to the terminals and contacts, as these are prone to overheating and failure in some Cadillac models.
• If the relay appears damaged or excessively worn, it's recommended to replace it with a new one. You can purchase a replacement fuel pump relay from a Cadillac dealership or a reputable auto parts store.
• Next, locate the fuel pump fuse. It will be a small, coloured piece of glass or plastic with a metal strip inside. The fuse box diagram, usually located on the back of the cover or in your owner's manual, will help you identify the correct fuse.
• Inspect the fuse for any signs of damage, such as a broken or melted metal strip. If the metal strip is intact and not discoloured, the fuse is likely fine.
• If the fuse appears damaged or suspect, it's best to replace it with a new one of the same amperage rating. Make sure to address any underlying issues that may have caused the fuse to blow, such as electrical shorts or faulty components.

Remember to exercise caution when working with automotive electrical systems. Always disconnect the battery before proceeding, and refer to your Cadillac DTS service manual for detailed instructions specific to your vehicle.

Frequently asked questions