Posi-Lock Glass Tube Fuse Holder

Posi-Lock Glass Tube Fuse Holder | Vintage Honda

The factory glass fuse holder on a vintage Honda gives you two problems as it ages. The terminals corrode until the fuse loses contact, and the right-length glass fuse gets harder to find every year. This universal Posi-Lock holder splices into your harness in minutes and accepts any glass tube fuse you can get your hands on.

Why You Need This

Most vintage Hondas run the entire wiring harness through a single glass tube fuse sitting in a stamped factory holder. When that holder's contacts corrode, the fuse can lose contact and the circuit goes dead even though the fuse itself is fine. And because glass fuses came in several lengths over the years, the exact one your bike needs can be tough to source, especially on the road.

The Posi-Lock holder fixes both. It's made in the USA, vibration proof, and installs by hand with no crimping or soldering. The body unscrews to accept any length or diameter of glass tube fuse, so you thread it down until it makes contact and you're back on the road, even with a fuse that isn't the original size. You still run the amperage your bike calls for.

Specifications

Model-Specific Notes

• Single-fuse bikes (CB175 / CL175, CB350 / CL350, CB450 / CL450, CT90): One 15A glass tube fuse protects the whole harness, so one holder does the job.
• Multi-fuse bikes (CB360 / CL360 / CJ360, CB500T, CB550, CB750): These run a fuse box with several fuses of different ratings, so you'll need one holder per fuse position. If you'd rather move to modern fuses, step up to our Posi-Lock Blade Fuse Holder.

Installation

Difficulty: Beginner

Tools needed: Wire strippers

1. Strip about 1/4" (6 mm) of insulation off each wire end.
2. Slide the threaded caps over the wire ends.
3. Fan out the loose strands. Do not twist them together first.
4. Thread each cap onto the body while keeping light pressure on the wire, until it draws down snug.
5. Give the wire a tug. If it pulls out, strip a hair more insulation and redo it.
6. Drop in your glass fuse and tighten the housing until it contacts the fuse.

Our Posi Products video demonstrates the glass tube holder on a bench setup, including how it accepts both shorter and smaller-diameter fuses.

Frequently Asked Questions

My factory fuse is a different length than a standard glass fuse. Will this holder still work?

Yes. The holder unscrews to accept any length or diameter of glass tube fuse, so one that's shorter or slightly smaller than your original still seats and makes contact. Just match the amperage your bike calls for.

What's the difference between this and the blade fuse holder?

This holder keeps the classic glass tube fuse. Our Posi-Lock Blade Fuse Holder converts the circuit to modern ATC blade fuses, which are easier to find at any auto parts store. Both wire in the same way.

How many do I need for my bike?

Single-fuse bikes (CB175, CB350, CB450, CT90 and their CL/SL variants) need one. Multi-fuse bikes (CB360, CB500T, CB550, CB750) use a fuse box with several fuses, so you'll need one holder per position.

Do I need to solder or crimp anything?

No. The caps thread onto the stripped wire by hand and hold without solder or crimping tools. All you need is a pair of wire strippers.

You Might Also Need

• 15A Glass Tube Fuses — the main fuse for single-fuse bikes
• 7A Glass Tube Fuses — the sub-fuses for multi-fuse-box bikes like the CB360 and CB500T
• Posi-Lock Blade Fuse Holder — convert to modern ATC blade fuses
• Posi-Lock Electrical Connectors — solderless butt connectors for harness repairs

Last updated: June 2026