WK2 Grand Cherokees are known for their torque, refinement, and towing ability, but there is a recall for your WK2. If you have symptoms such as cranking but not starting, or cutting out unexpectedly while driving, the fuel system, specifically the fuel pump relay and wiring could be to blame.
The Fuel Pump Relay Recall (V62)
Jeep recognised this fault early on and issued a recall campaign (V62) for many WK2s. The core of the issue? Faulty wiring related to the fuel pump relay inside the TIPM (Totally Integrated Power Module). If left unaddressed, this can lead to:
- Starting failures
- Fuel starvation
- Sudden engine shutdown while driving
The fix? Jeep dealerships perform a relay bypass procedure using an external relay harness, which reroutes power to the fuel pump. This recall should be done free of charge, and if your WK2 hasn’t had it completed, book it into a dealer ASAP.
Unfortunately, even after the recall, some vehicles continue to suffer from intermittent fuel pump issues. Why? Because burnt wiring or melted connectors at the pump or relay often get overlooked, especially during rushed or DIY repairs.
In a recent case in our shop, we uncovered a backyard fix where someone bypassed the relay with makeshift wiring. Not only was it unsafe, but it was also the reason the vehicle wouldn’t start reliably. Shortcuts like this create long term headaches, and worse, can be dangerous.
If you’re replacing the low pressure fuel pump, it’s beneficial to inspect the wiring harness as well. Damaged or degraded wiring will continue to interrupt fuel delivery, even with a brand new pump installed. Chasing a no start without inspecting the wiring is a waste of time and money.
Step by Step Diagnosis for Fuel Issues
Here’s how we approach it in the workshop:
- Check recall status – Has the V62 relay bypass been performed?
- Inspect wiring at the fuel tank – Look for burns, corrosion, and dodgy repairs.
- Test power at the pump – Confirm voltage is reaching the low-pressure pump.
- Check the high-pressure fuel pump – Especially if the low side checks out.
- Drop the tank if needed – Sometimes a full inspection is the only way to catch hidden faults.
WK2 Grand Cherokees are fantastic vehicles, but when fuel delivery becomes unreliable, it’s essential to look beyond just the pump itself. Burnt wiring, incomplete recalls, and bad repairs are at the heart of many of these issues.
If your diesel Jeep is hard to start, cuts out while driving, or has already had multiple pumps replaced, you need a proper diagnosis, not another guess. Give us a ring on 9987 2818 or book online.
At GDL Automotive, we fix what others miss.
