GM Pump-on-a-Stick Fuel Pump Wiring Kit HD, Tyco-Type Pumps
GM Pump-on-a-Stick Fuel Pump Wiring Kit HD, Tyco-Type Pumps
High-Output Fuel Pump Wiring Kit | Tall Hanger (Metal)
Item #: FPWK-029W
Product Overview
The Racetronix FPWK-029W is a heavy-duty power solution specifically engineered for GM vehicles utilizing the "Pump on a Stick" metal hanger assembly (pre-plastic module era). Beyond performance, this kit is a critical safety upgrade for high-flow pumps.
Factory fuel pump circuits were never designed to handle the 20+ amp draw of modern high-output pumps. Attempting to run these pumps on original thin-gauge wiring frequently leads to blown fuses and catastrophic heat damage, often melting in-tank wiring, bulkhead connectors, factory relays, and even terminals inside the factory fuse center. This kit bypasses these vulnerable factory components, delivering maximum voltage directly from the alternator to the fuel pump while protecting your vehicle’s electrical integrity.
Compatibility & Configuration Guide
Verify your configuration before ordering to ensure correct fitment:
| Hanger Type: | Metal "Pump on a Stick" Tall Hangers. Ideal for common assemblies such as the Delphi HP10000 found in 1980s and early 90s GM SUVs/Trucks. |
| Bulkhead Interface: | Utilizes the BCA-4W Bulkhead Connector for secure, fuel-safe, vapor-proof pass-through. |
| Pump Compatibility: | Designed for pumps with the standard 2-pin Tyco-type connector (the same connector used on Walbro GSS pumps), including:
|
Harness Input Side: Weather-Pack Keying & Pinout
NOTE: This guide applies ONLY to the INPUT connector of the Racetronix Hotwire Harness.
3-POS 6-0-X
(Standard Harness)
3-POS 0-X-0
(RCS-089 / HP10000)
2-POS 3-0 Pattern
(1985-1991 S10)
| Cavity | 3-POS Function | 2-POS Function | Wire Color |
|---|---|---|---|
| A | Ground | Relay Trigger | Black (3P) / Gray (2P) |
| B | Level Sensor | Level Sensor | Violet |
| C | Relay Trigger | N/A | Gray |
Kit Contents & Component Breakdown
- FPWH-029 - GM Pump-on-a-Stick Fuel Pump Wiring Harness HD
- BCA-4W - FS Bulkhead Connector Assembly 4-way
- IPH-3W48 - Intermediate Pump Harness WP/MP280 48"
- ITWH-042 - In-tank Harness, HD 12", MP1504F » GSS
- RCS-089 - Connector Set, Weather Pack 3T 0-X-0
- 199-T-3 - Tool, Weather-Pack Terminal Removal
The kit ships with the 48" IPH-3W48. If your relay mounts closer to the hanger, the IPH-3W12, IPH-3W18 and IPH-3W36 are available separately.
Frequently Asked Questions (FAQ)
Q: Can I use this kit for late-model vehicles with a plastic fuel pump module?
A: No. This kit is specifically for the GM/Delphi "Pump on a Stick" metal hangers found in most 1980s and early-to-mid 90s GM SUVs and pickup trucks.
Q: Why doesn't the 3-pin connector mate with my factory harness?
A: This refers to the input side of the Racetronix Hotwire Harness. GM used several different "keys" for the Weather-Pack housings. We include the RCS-089 kit so you can quickly swap the housing to match your specific vehicle's configuration (e.g., the 0-X-0 pattern common to the Delphi HP10000).
Q: Why is the orientation of the bulkhead connector's stainless steel clip so critical?
A: The BCA-4W bulkhead features an E-B-D-C center map that must align with the in-tank harness. If the clip is installed 180° out of phase, the terminals will not line up, leading to potential electrical damage.
Q: How does this kit achieve such a high current rating?
A: Through "Parallel Pathing." We utilize ultrasonic welding to bond the main 10AWG power wire to two 14AWG conductors, doubling the current capacity through the bulkhead connector.
Q: Why do I have to drill a hole for a brass grounding stud?
A: High-output pumps require a robust ground path that factory bulkhead terminals cannot provide. By using an external 1/4" brass stud for the high-current ground, we free up terminals in the bulkhead for the dual positive power feeds. Furthermore, this isolates the pump's heavy ground load from the level sensor's ground circuit, preventing ground potential differential and ensuring your 0-90 Ohm fuel gauge remains accurate.
Q: What is the output connector used on this harness?
A: The output side uses a heavy-duty Metri-Pack 280-series connector. This is designed for high-current delivery directly to the fuel pump bulkhead and has no relation to the input side Weather-Pack keying.
Q: My relay mounts closer to the fuel pump hanger. Do I have to use the 48" intermediate harness?
A: No. The IPH bridges the distance between the relay on the frame and the top of the hanger, and that distance varies by vehicle. The IPH-3W12, IPH-3W18 and IPH-3W36 are available separately for shorter runs.
Q: Can I run a Walbro 525 (DCSS) pump with this kit?
A: No. The FPWK-029W is for pumps with the standard 2-pin Tyco-type connector. For the Walbro 450/525 series, or other pumps that terminate in a Metri-Pack 280-series connector on flying leads, you require the FPWK-029D kit with the correct DCSS in-tank harness.
Confirm Your Vehicle Configuration
Before purchasing, we highly recommend verifying your specific fuel hanger and connector type using the Delphi Auto Parts Catalog. Enter your vehicle's VIN number and review the images to verify your factory wiring orientation.
Questions & Technical Support
Have a question before you buy? Email [email protected].
Racetronix provides technical support to verified customers through our support forum, not by phone or email. Please request forum access when you place your order so your account is approved before your parts arrive. The forum is moderated, open 24/7, and holds a knowledge base going back to 1999.
