C5 Fuel Pump Wiring harness HD
$89.99
per EACH (USD)High-Output Fuel Pump Wiring Harness (HD) | Corvette C5 1997-2003
Item #: FPWH-052HD
Product Overview
The Racetronix FPWH-052HD is the core electrical upgrade for the 1997-2003 C5 Corvette fuel system. This heavy-duty harness is designed to fundamentally re-engineer power and ground delivery to your fuel pump module, bypassing the resistance bottlenecks inherent in the factory system.
By repurposing factory ground circuits into a dual-positive feed, we effectively double the current-carrying capacity through the bulkhead. This system is designed specifically for the high-quality stainless steel factory Delphi module.
Kit Configurations & Contents
This harness is the primary component of our comprehensive upgrade kits. Select the appropriate kit based on your fuel pump type:
FPWK-052 (Standard GSS/RXP Kit)
- FPWH-052HD - High-Output Wiring Harness
- BCA-4W - Bulkhead Connector Assembly (Delphi-certified)
- ITWH-055 - In-Tank Harness (Standard connector for Walbro 255/340 pumps)
FPWK-052-D (High-Flow DCSS Kit)
- FPWH-052HD - High-Output Wiring Harness
- BCA-4W - Bulkhead Connector Assembly (Delphi-certified)
- ITWH-054 - In-Tank Harness (DCSS connector for Walbro 450/525 pumps)
Engineering Advantage
- Current Capacity: The reconfigured wiring system doubles current-carrying capacity upwards of 28 amps, providing more than enough overhead for the highest-flow pumps on the market.
- Heavy-Duty Architecture: Utilizes 10-gauge TXL automotive-grade wire for the main power input, ensuring maximum conductivity and thermal resistance.
- Precision Ultrasonic Termination: Our main 10AWG power feed is carried to within inches of the fuel pump module. To overcome the physical size constraints of the bulkhead terminals, we employ a high-reliability ultrasonic splice to transition into a dual-path 14AWG configuration. This allows us to feed two bulkhead terminals in parallel, maximizing current-handling capacity while keeping resistance to an absolute minimum.
- Professional Protection: Features a Delphi Metri-Pack 630-series sealed fuse holder (ATC fuse) and a 40-amp rated Metri-Pack 630-series sealed relay assembly.
- Dual-Positive Feed: Re-purposed ground circuit provides a secondary power path through the bulkhead, eliminating the Metri-Pack 150 terminal bottleneck.
- Perimeter Grounding: Ground current is relocated from the bulkhead to the module's perimeter bolts, utilizing the stainless steel hat's structural mass as a high-current ground bus.
- Isolated Signal: Level sensor signals remain on their own dedicated bulkhead terminals, ensuring gauge accuracy and preventing voltage ripple/interference.
Frequently Asked Questions (FAQ)
Q: Can I use the FPWH-052HD harness with my stock in-tank wiring?
A: No. This system is not compatible with a factory-configured in-tank harness. Because the FPWH-052HD repurposes the factory ground path as a second positive feed, plugging it into a stock in-tank harness will ground the positive feed inside the tank, resulting in an immediate blown fuse.
Q: Why do you recommend only original Delphi modules (yellow bulkhead/stainless hat)?
A: Original Delphi bulkhead connectors were more robust and vacuum-impregnated to ensure they seal well under pressure, making them the highest quality on the market. Furthermore, factory modules feature spot-welded ground tabs on the underside of the stainless steel hat, which are required for the ground connections on our ITWH-055/054 harnesses. Aftermarket modules often use lower-quality "white-connector" bulkheads and frequently lack these essential ground tabs, preventing a proper installation. If you are unsure if you have an original stainless steel Delphi unit, please email us with photos before installation.
