The 1963 Checker Marathon has 4 electrical switch & relay parts with verified fitment on this page — 1 part type and 4 brands, covering both the 3.7L 226cid L6 and the 5.2L 318cid V8. Each part includes a manufacturer part number and application notes.
On the 1963 Checker Marathon, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. Every listed part is a Horn Relay.
The 1963 Checker Marathon was sold with both the 3.7L 226cid L6 and the 5.2L 318cid V8. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 1963 Checker Marathon electrical switch & relay parts are FAMOUS BRAND (1 part), ROSTRA (1 part) and STANDARD MOTOR PRODUCTS (1 part), plus 1 more brand.
Each part number listed for the 1963 Checker Marathon opens a page with every vehicle that part fits.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FAMOUS BRAND Fits: 3.7L 226cid L6 | RAC1004 | 🇺🇸 US 🇨🇦 CA | 12V | View on Amazon |
| ROSTRA Fits: 3.7L 226cid L6 | 600299 | 🇺🇸 US | with 12 Volt System | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 3.7L 226cid L6 | HR106 | 🇺🇸 US | View on Amazon | |
| WELLS Fits: 3.7L 226cid L6 | 1R1715 | 🇺🇸 US | This horn relay can be used for any 12 Volt, Three terminal application that does not require an internal resistorUniversal Horn Relay, 12 Volt Type Three Screw Terminals | View on Amazon |
This table covers the relays that control the Horn circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.
4 Horn Relay parts are listed for the 1963 Checker Marathon, from FAMOUS BRAND, ROSTRA, STANDARD MOTOR PRODUCTS and 1 other brand.
Listed part numbers: FAMOUS BRAND RAC1004, ROSTRA 600299 and STANDARD MOTOR PRODUCTS HR106, plus the other parts above.
Buying Electrical Switch & Relay Parts for a 1963 Checker Marathon
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Match the engine first. Every electrical switch & relay part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Horn Relay .
Frequently Asked Questions
How many electrical switch & relay parts fit the 1963 Checker Marathon?
Our catalog currently lists 4 electrical switch & relay parts for the 1963 Checker Marathon across 1 subcategory and 4 brands, covering both the 3.7L 226cid L6 and the 5.2L 318cid V8. Each part is matched to the engine(s) it fits.
Do electrical switch & relay parts differ between 1963 Checker Marathon engines?
Yes. Every electrical switch & relay part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical switch & relay problems on a 1963 Checker Marathon?
Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1963 Checker Marathon was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1963 Checker Marathon?
First match the engine — each row shows which engine(s) the part fits. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1963 Checker Marathon
Electrical Switch & Relay Parts for Other Checker Marathon Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.