SureTrack Real Fix: Green Monster Strikes Again

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Real Fixes from Mitchell 1’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is available at no additional cost in our ProDemand product.

Corrosion is a horrible monster. But never more insidious than when it affects the wiring. SureTrack community member carls4460 had a Ford F350 Super Duty truck that was towed in for a no-start condition. They thought they found the cause but that didn’t fix it. They posed the question to the community, and with the help of fellow community member Poppyshop and others, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

Vehicle
2019 Ford F-350 Super Duty XL 6.2L

Title
No start, no fuel pressure, repaired wiring.

Complaint
Customer states that truck will not start.

Diagnostic Steps Performed/Parts Replaced
Vehicle was towed in with a crank, no start condition. DTC showed P162F. Verified it had spark but found no fuel pressure. Verified we had 12 volts at the fuel pump and driver module. Tapped on the tank and it started and ran for a short period of time. Installed new factory Ford fuel pump and driver module. Attempted to start, it started and ran for 5 to 10 seconds then died. We now have only 5 volts at both the pump and driver module. Traced the wire (violet and green) from the driver module to the battery junction box (under the hood) and it has good continuity. Have only 5 volts coming out of the junction box. Turned on the fuel pump with scan tool and there was no voltage change, unknown if it actually did turn it on. Suggestions, ideas? Has anyone run into this problem? We are worse off than we were before we replaced the fuel pump/driver module.

Best Answer from Community Member Poppyshop
Check voltage at fuse F75, if you have 12V there you can wire in new relay.

Cause
Found corrosion on several wires under power junction box under the hood.

Correction
Cleaned and treated power junction box and wires with Stabilant 22. Reattached all of the wires and now have 12 Volts on all correct wires. Vehicle now starts and runs as it should.

SureTrack® adds to the power of ProDemand® with an exclusive combination of real-world knowledge and powerful diagnostic tools, all wrapped in an interactive community of professional technicians. Designed to help automotive shops increase accuracy and efficiency from diagnosis to completed repair, the industry’s most comprehensive repair information resource is just a few clicks away.

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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.