Tech Tip: Replacing a Volvo Fuel Pump Connector – UnderhoodService

Tech Tip: Replacing a Volvo Fuel Pump Connector

Use the following procedure to replace the fuel pump connector on 1993 and newer 850, S70, V70 and C70 models. For five-door vehicles, remove the four screws from the floor hatch, pull the hatch backward and lift it out. For four-door vehicles, remove the floor mat, loosen the right panel at the front edge and fold it away.

Use the following procedure to replace the fuel pump connector on 1993 and newer 850, S70, V70 and C70 models.

Service Procedure
1. For five-door vehicles, remove the four screws from the floor hatch, pull the hatch backward and lift it out.
For four-door vehicles, remove the floor mat, loosen the right panel at the front edge and fold it away.

figure 1

2. For five-door vehicles, remove the connector from the bracket by pushing the lock down using a small screwdriver (1/8”-5/32” wide), then push the connector toward the right side of the car. See Figure 1.

Separate the connector.

For four-door vehicles, remove the connector from the holder by pushing the lock (1) outward using a small screwdriver (1/8”-5/32” wide), and then pushing the connector (2) upward. See Figure 2.

3. Check that the wire terminals are centered in the connector socket insulators. Carefully wiggle the wires to make the terminals move. Replace the connector if the terminals can be moved farther in both directions, than what Figure 3 shows. Replace the connector and terminals if any terminal is bent.

4. Check the corners in the slot of the connector to make sure they’re undamaged. Replace the connector and terminals if any slot or terminal is damaged.

figure 2

5. Cut the wire 10 mm (3/8”) from the connector.

6. Strip the wires 5-6 mm (3/16-1/4”). It’s recommended to use stripping pliers that can be set for stripping distance and wire diameter.

7. Insert the stripped ends into the butt-connector. Ensure that the color-coding matches before crimping. Note: Do not twist the wires.

8. Use tool #951 2656 to crimp the wires. Check that the wires are firmly attached by carefully pulling on them.

9. Before sealing the butt-connectors, protect the interior and other wiring from the heat. Carefully heat the connector until the shrink tube seals the connector ends.

Warning: Use a hot air gun with the heat setting in low. Do not touch the surface after finishing work; the connector is hot.

Figure 3

10. If the shrinkage is properly done, glue should be protruding from the ends of the shrink sleeve.

11. Install the connector to the bracket.

12. Start the engine and ensure engine operation.

13. Reinstall the interior in reverse order.

Courtesy of IDENTIFIX.

You May Also Like

Diagnosing Misfires

What if there are no codes and a misfire is intermittent? This is where it gets complicated.

What is a misfire? Is a misfire when the cylinder does not fire? Is it when the cylinder fires too soon or too late? The answer is “yes” to both questions. Some misfire complaints are a flashing check engine light, and a P0300 to P0312 diagnostic trouble code (DTC) indicates that one or more cylinders are misfiring. This is the easiest misfire to diagnose. But, what if there are no codes and a misfire is intermittent? This is where it gets complicated. 

ECM Damage

Engineers have devised two strategies that can be called the “immune system” for the electrical system.

Voltage Drop Testing

The measurement of voltage is like the speed of the traffic.

Spark Plug Fouling

Understanding why spark plugs get dirty.

Understanding Stop/Start Charging and Starting Systems

The problem may not have been caused by a complicated reason, something simple may have caused the system not to work.

Other Posts

Caring For AGM And Flooded Car Batteries

Faulty battery cables, if loose, corroded, or damaged, can lead to power drainage.

Power Window Regulator and Motor Service

Power windows are great as long as they roll up and down when commanded to do so.

Lifter Deactivation

The area of contact between the lifters and cam lobes is the highest loaded surface inside an engine.

Alternator Testing For No Charge Conditions

Many alternator problems turn out to be nothing more than a bad connection at the alternator or a bad wiring harness.