Subaru GL Horn Replacement Guide for 1975-1989 Models
A dead or weak horn is a safety risk; here is how to choose the right new aftermarket replacement for your GL.
- A non-working horn is a critical safety failure and will likely cause your vehicle to fail a safety inspection.
- For a vintage Subaru GL, a quality aftermarket horn from a brand like Standard Ignition is a reliable and cost-effective replacement.
- Troubleshooting should include checking the fuse, relay, and wiring before assuming the horn unit itself has failed.
- Replacing the horn is a simple DIY task for most owners, requiring only basic tools and less than an hour of time.
Is Your Subaru GL Horn Failing?
A horn that doesn't work is more than an annoyance; it's a serious safety issue that can fail a vehicle inspection. For a vintage vehicle like the 1975-1989 Subaru GL, horn problems are common due to the age of the electrical components. The issue could be the horn unit itself, but it's also frequently caused by other parts of the circuit. Common points of failure include a blown fuse, a faulty relay, corroded wiring or ground connections, or a worn-out switch in the steering column. In some cases on older Subarus, the horns themselves simply fail from age and exposure to the elements.
Choosing the Right Aftermarket Horn
Finding a new Original Equipment Manufacturer (OEM) horn for a vehicle of this age is nearly impossible. Fortunately, the aftermarket provides reliable and affordable solutions. For a simple part like a horn, a quality aftermarket unit is a perfectly acceptable choice.
Two common brand tiers you will encounter are:
- Standard Ignition (or SMP): This is a well-regarded aftermarket manufacturer known for producing quality components that meet or exceed original specifications. A horn from Standard Ignition is a solid choice for reliability and proper function, making it a good investment for a daily driver or a vehicle you depend on.
- Replacement Brand: This category represents more budget-friendly, generic parts. While the price is attractive, quality can be inconsistent. For a part like a horn, a "Replacement" brand unit will likely work, but it may not have the same durability or sound quality as a more established brand. It's a viable option if the budget is the primary concern.
Pro Tip: Check the Whole System
Before buying a new horn, take a moment to troubleshoot. Check the fuse box for a blown fuse and listen for a clicking sound from the horn relay when you press the button. A clicking relay usually means the relay is working and the problem is likely the horn itself or the wiring to it. No click could mean a bad relay or a problem with the horn switch in the steering column.
Estimated Replacement Costs for 1975-1989 Subaru GL Horn
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Horn | $36.29 - $77.37 |
| Shop Labor | $55 - $85 |
| New OEM Horn | Not Generally Available |
| Used OEM Horn | $20 - $50 (Junkyard/eBay) |
Frequently Asked Questions
Where is the horn located on my Subaru GL?
On most 1975-1989 Subaru GL models, the horn (or horns, as some have two) is located at the front of the engine bay, usually behind the grille or attached to the radiator support. This makes it relatively easy to access for testing and replacement.
Is replacing the horn a difficult DIY job?
No, this is a very easy DIY job for most owners. The horn is typically held on by a single bolt and has a simple one or two-wire electrical connector. Basic hand tools are all that's required, and the job can usually be done in under 30 minutes.
My horn sounds weak or muffled. Does it need to be replaced?
A weak or funny-sounding horn is a classic symptom of failure. It can be caused by a failing horn unit, a poor electrical ground, or low voltage. While you should check the connections first, a weak sound often means the internal diaphragm of the horn is failing and the unit should be replaced.
Why does my horn blow a fuse?
A fuse blowing immediately when the horn is pressed indicates a short circuit. This means power is going directly to the ground before it gets to the horn. This could be caused by damaged wiring anywhere between the relay and the horn, or an internal short within the horn unit itself. Using the wrong amperage fuse can also cause issues and is a fire hazard.
Technical Specifications
Voltage: 12V. Tone: High or Low Note options available. Connection: Typically single or dual spade connectors.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.