What problem does the Circuit 15 Bypass Kit solve on late-model Vanagons (1986–1991)?

The Circuit 15 Bypass Kit addresses a common issue in 1986–1991 Vanagons where the factory ignition switch and associated wiring degrade over time, causing intermittent or complete loss of power to the fuel injection system. This can lead to hard starting, stalling, or the van failing to run reliably. The kit reroutes the power for the fuel injection system through a dedicated relay and fuse, bypassing problematic original wiring to ensure consistent voltage and improved engine reliability.

Is this kit compatible with all late-model Vanagons, and do I need any extra parts to install it?

This kit is specifically designed for 1986–1991 Volkswagen Vanagons with the waterboxer engine and factory electronic fuel injection. Everything needed for the installation is included in the kit—no extra parts are required. Always double-check your Vanagon's year and make sure it fits the model range before ordering. If your vehicle uses an aftermarket or swapped engine, compatibility may vary.

How difficult is the installation, and can an average DIYer handle it?

Installation of the Circuit 15 Bypass Kit is straightforward for most DIYers with basic tools and some confidence working with automotive wiring. The kit includes detailed, step-by-step instructions. No specialized tools or soldering are required—most connections are via supplied crimp or plug-in terminals. The process involves mounting the relay, routing a few wires, and making simple connections, usually taking about 30–60 minutes depending on your skill level.

How does this kit improve reliability compared to simply repairing the original wiring or replacing the ignition switch?

Unlike repairing brittle or corroded factory wiring or replacing just the ignition switch, the Circuit 15 Bypass Kit creates a new, dedicated power path for the fuel injection system. By using a high-quality relay and fuse, it reduces the electrical load on the aging ignition switch and wiring, which are prone to failure over time. This proactive solution offers a more robust and long-term fix for reliability issues, preventing common 'no start' or stalling problems due to voltage drops.

What troubleshooting tips does this kit help with if I'm experiencing starting or stalling issues?

If your late-model Vanagon has intermittent starting troubles, loses power while running, or won’t start at all—even after replacing the ignition switch—the Circuit 15 Bypass Kit can resolve these issues by ensuring a reliable supply of power to the engine management system. It eliminates voltage drops caused by corroded or worn connections. Many owners have found that installing this kit immediately resolves unexplained stalling and hard-start problems that persisted despite other repairs.

Two blue connectors and a black cable on a white background

Close-up of automotive wiring harness with connectors.

Thumbnail of Two blue connectors and a black cable on a white background

Thumbnail of Close-up of automotive wiring harness with connectors.

Circuit 15 Bypass Kit [Late Vanagon]

Product:	GW-STALL-GONE
Works With:	1986-1991
Manufacturer:	GoWesty
Restock ETA:
Availability:
Difficulty:	Requires some hand & power tools and minimal mechanical knowledge.

Proposition 65: This product may contain chemicals known to the state of California to cause cancer, birth defects, or other reproductive harm.

Back when we restored late-model Vanagons, we added this simple circuit as a reliability-enhancing feature to every GoWesty van we sold. It is simple, and it works!

Every bit of power that keeps your 1986–1991 Vanagon running flows through the fuse box. Specifically, circuit #15.

Over time, the connections between the wiring harness plugs and the fuse box degrade. When they do, you can end up with an infuriating intermittent stalling issue that’s often misdiagnosed as a failing engine management component. That misdiagnosis can trigger a long and expensive parts-replacement spiral.

This simple kit creates a redundant circuit that completely bypasses the aging fuse box connection. The result? When you turn the key, your van is far more likely to start, run properly, and keep running.

Simple solution. Major peace of mind.