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Standard Ignition FWH103 Diesel Exhaust Fluid (DEF) Pump Wiring Harness
| Brand | Standard Ignition FWH103 |
|---|---|
| Connector Gender | Female + Male |
| Terminal Gender | Female + Male |
| Terminal Type | Blade & Pin |
| Fits | Ford · 12 vehicles |
OE-spec tested. Built for dependable performance and long service life.
Plug-and-play design. Connects easily with no modifications needed.
High-temp connector. Helps resist melting and repairs broken connections.
Cross-references Standard Ignition DFH103, 850-11673 and EFW203 for the same application. See all 4.
DEF Pump Wiring Harness for Ford Super Duty
Standard Ignition FWH103 is a diesel exhaust fluid pump wiring harness for 2017-2019 Ford F-250 Super Duty and 2017-2019 Ford F-350 Super Duty applications. It is built as a direct plug-and-play replacement for damaged factory wiring between the harness and DEF pump.
- Direct replacement DEF pump wiring harness for Ford Super Duty diesel emission systems
- Plug-and-play design connects between the factory harness and pump
- High-temperature connector helps resist heat-related melting
- Built to OE specifications for fit, function, and service life
- Repairs broken or corroded electrical connections in the DEF pump circuit
- Female and male connectors with blade and pin terminals
OE-Style Construction
Standard Ignition FWH103 is engineered for the diesel exhaust fluid pump circuit and focuses on restoring electrical continuity where the original harness has failed. The harness uses a complete inline connection design, making it a practical OE-style replacement for Ford F-250 Super Duty and Ford F-350 Super Duty trucks that need a dependable DEF pump wiring repair. This part cross-references Ford HC3Z14407A for the same application.
Common Problems It Can Solve
- Broken wiring between the factory harness and DEF pump
- Corroded electrical connections at the pump interface
- Heat damage at the connector body
- Intermittent DEF pump electrical faults
- Loss of continuity in the emission control wiring circuit
Installation Notes
Verify connector style and routing before installation. This harness is designed to plug between the factory harness and the pump, so it installs without modifying the original wiring when the vehicle matches the listed application. Confirm the DEF pump connection points and inspect nearby terminals for corrosion or heat damage before reconnecting.
Quality Assurance
Standard Ignition states that this harness is extensively tested to OE specifications to support proper performance and long service life. The high-temperature connector design adds protection in a demanding underbody environment.
| Year | Make | Model | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2019 | Ford | F-250 Super Duty | — | 6.7L | V8 | N/A | — |
| 2019 | Ford | F-350 Super Duty | Crew Cab Pickup | 6.7L | V8 | N/A | — |
| 2019 | Ford | F-350 Super Duty | Extended Cab Pickup | 6.7L | V8 | N/A | — |
| 2019 | Ford | F-350 Super Duty | Standard Cab Pickup | 6.7L | V8 | N/A | — |
| 2018 | Ford | F-250 Super Duty | — | 6.7L | V8 | N/A | — |
| 2018 | Ford | F-350 Super Duty | Crew Cab Pickup | 6.7L | V8 | N/A | — |
| 2018 | Ford | F-350 Super Duty | Extended Cab Pickup | 6.7L | V8 | N/A | — |
| 2018 | Ford | F-350 Super Duty | Standard Cab Pickup | 6.7L | V8 | N/A | — |
| 2017 | Ford | F-250 Super Duty | — | 6.7L | V8 | N/A | — |
| 2017 | Ford | F-350 Super Duty | Crew Cab Pickup | 6.7L | V8 | N/A | — |
| 2017 | Ford | F-350 Super Duty | Extended Cab Pickup | 6.7L | V8 | N/A | — |
| 2017 | Ford | F-350 Super Duty | Standard Cab Pickup | 6.7L | V8 | N/A | — |
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