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SKU:
NLT1Q00375
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Holley 40205G-Style Electric Fuel Pump Relay Wiring Harness Kit
$39.99
In Stock
$39.99
Sale price
$39.99
Regular price
New aftermarket heavy-duty electric fuel-pump relay and wiring harness kit cross-referencing Holley 40205G, with fused battery feed, relay, trigger wire, pump output, and ground leads for compatible custom installations.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- Universal/custom electric fuel-pump installations compatible with a 40205G-style harness
- Vehicle restorations, engine swaps, and aftermarket fuel systems by electrical specification
Product Overview
Voltage drop through undersized wiring or an overloaded ignition switch can make an electric fuel pump run slowly, overheat, or stop intermittently. A relay harness lets the pump draw current through a fused battery circuit while the ignition or control switch handles only the relay trigger.
This is a wiring kit, not a fuel pump. Wire gauge, fuse size, relay capacity, routing, grounding, and pump-current requirements must match the installation.
Key Features & Performance
- Relay-controlled electric fuel-pump power circuit
- Fused high-current battery feed
- Separate trigger, ground, and pump-output leads
- Useful for custom, retrofit, and replacement harness work
Replaces Part Numbers
- 40205G
Common Uses
- Adding a relay to an aftermarket electric fuel pump
- Replacing overheated or undersized pump wiring
- Improving voltage delivery in a custom fuel-system installation
Technical Specifications
- Product Type: Fuel pump relay wiring harness kit
- Application: Universal/custom by electrical specification
- Reference: 40205G
- Condition: New
- Replacement Type: Aftermarket
Installation & Fitment
- Mount the relay and fuse away from heat and moisture
- Connect the fused battery feed at an appropriate protected source
- Use a clean chassis/battery ground and secure all terminals
- Route wires away from exhaust, sharp edges, and moving parts
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Production date, engine type, transmission, trim, serial number, and previous repairs can change fitment. Compare the original part, mounting points, dimensions, connections, and listed reference numbers before purchase.
Frequently Asked Questions
Q: Does this kit include a fuel pump? A: No. It is the relay and wiring harness kit.
Q: Why use a relay? A: It lets the pump receive current through a short, protected high-current path instead of loading the switch circuit.
Q: What fuse should I use? A: Follow the pump manufacturer's current requirement and the harness instructions; do not oversize the fuse.
Q: Can this be used on any vehicle? A: Only where voltage, current, control strategy, and wiring design are compatible.
Part Summary
keywords: 40205G fuel pump harness, electric fuel pump relay kit, heavy duty pump wiring, fused fuel pump relay, custom fuel system harness
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.