Product Description
Replace brittle, oil-soaked wiring and restore reliable power to your factory lift pump with the genuine Cummins 4025182 OEM lift pump wiring harness for 1998.5–2002 Ram 5.9L 24-valve VP44 trucks. This plug-and-play harness clips directly into the factory connectors on the engine block–mounted lift pump and chassis harness—no splicing, guessing, or chasing electrical gremlins.
Why Choose Genuine Cummins 4025182?
- Direct-fit OEM solution – Correct connectors, wire gauge, and length for VP44-powered 5.9L Cummins.
- Factory-level reliability – Built to Cummins specs for heat, vibration, and diesel environment exposure.
- Plug-and-play install – Clips into the factory block-mounted lift pump and OE engine harness.
- Fixes common no-start issues – Replaces chafed, corroded, or intermittent pump power circuits.
- Perfect when upgrading the lift pump – Start with a clean, OEM-quality electrical feed.
Fitment – 1998.5–2002 VP44 24-Valve Cummins
- 1998.5–2002 Dodge Ram 2500 5.9L 24-valve Cummins (VP44), block-mounted lift pump only
- 1998.5–2002 Dodge Ram 3500 5.9L 24-valve Cummins (VP44), block-mounted lift pump only
- Designed for trucks that still use the factory engine block–mounted lift pump
Note: This harness does not fit trucks that have been converted to an in-tank lift pump or aftermarket frame-rail system that bypasses the original block-mounted pump connector.
When Should You Replace the Lift Pump Harness?
- Lift pump runs intermittently, cuts out on bumps, or is silent even with a good pump.
- Visible cracks, oil saturation, or melted insulation near the pump connector.
- Previous owner spliced or “repaired” the harness with butt connectors or household wire.
- You are replacing the VP44 and want the fuel supply electrical side 100% right the first time.
Cross-Reference & Related Genuine Cummins Parts (CPP Diesel)
- CUMMINS 3941156 OEM VP44 OVERFLOW VALVE (CHECK VALVE) – 5.9L 24-VALVE (1998.5–2002)
- CUMMINS 4988747 OEM MECHANICAL FUEL TRANSFER (LIFT) PUMP – 5.9L CUMMINS (1994–1998)
- CUMMINS 3924726 OEM FUEL RETURN CHECK VALVE – RAM 5.9L 12V (1989–1998)
For a full rundown of OEM and performance fuel system components, also see our 1998.5–2002 VP44 fuel system section.
Installation Notes
- Disconnect batteries before unplugging the old harness.
- Unclip the OE harness from its retainers, route the new harness along the same path, and secure in all factory clips.
- Inspect the block-mounted lift pump connector for corrosion and clean as needed before plugging in.
- After installation, key-on and verify lift pump operation and proper fuel pressure before starting.
FAQ – CUMMINS 4025182 OEM LIFT PUMP WIRING HARNESS
How do I know if this harness fits my truck?
This harness is for 1998.5–2002 Ram 2500/3500 with the 5.9L 24-valve Cummins and VP44 injection pump, only when the lift pump is still mounted on the engine block. If your lift pump has been relocated to the tank or frame rail, this harness will not plug in.
Will this work with an in-tank or frame-rail retrofit lift pump?
No. In-tank or frame-rail retrofits typically bypass the factory block-mounted pump connector that this harness uses. This part is intended for trucks that still use the OE block-mounted lift pump style.
Is this a genuine Cummins part or an aftermarket harness?
This is a genuine Cummins 4025182 wiring harness, not an aftermarket copy. You get factory-correct wire colors, terminals, seals, and durability for long-term reliability.
Should I replace the harness when I install a new lift pump or VP44?
It is strongly recommended. A brand-new pump fed by a weak or intermittent power supply can still fail early. Replacing the harness at the same time removes a major variable and protects your VP44 investment.
Do I need to cut or splice any wires?
No. This harness is plug-and-play. Simply unplug the old harness, route the new one along the factory path, snap it into the OE clips, and connect it to the pump and body/engine harness.
Specifications for cummins 4025182
| Specification | Detail |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 4025182 |
| Component Type | Lift Pump Wiring Harness – Engine Block–Mounted Pump |
| Engine Compatibility | 5.9L 24-valve Cummins (B-series), VP44 electronic rotary injection pump |
| Vehicle Compatibility | 1998.5–2002 Dodge Ram 2500/3500 with 5.9L 24-valve Cummins (VP44), block-mounted lift pump |
| Location | Engine block area – connects lift pump to engine/body harness |
| GTIN | Not published by Cummins |
| UPC | Not published by Cummins |
| Shipping Weight | Approx. 0.06 lb (harness only; packaged weight slightly higher) |
| Package Dimensions | Approx. 7.75 in × 6.25 in × 0.125 in (manufacturer packaging) |
| Cross Reference (Related Cummins Parts) | Cummins 3941156 VP44 Overflow (Check) Valve – 1998.5–2002 5.9L 24V; Cummins 4988747 Mechanical Lift Pump – 1994–1998 5.9L 12V; Cummins 3924726 Fuel Return Check Valve – 1989–1998 5.9L 12V. |
| E-Codes / Emissions | OE repair component; no performance tuning or emissions alteration |
| Prop 65 Warning | This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information, visit www.P65Warnings.ca.gov. |
| Country of Origin | As supplied by Cummins (country may vary by batch) |
