This page lists 7 electrical switch & relay parts for the 1966 Fiat 124, across 2 part types, covering the 1.2L L4 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 1966 Fiat 124, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. All 7 listed parts are Oil Pressure Sender / Switch (5 parts) and Horn Relay (2 parts).
The 1966 Fiat 124 came with a single engine, the 1.2L L4, and every part is verified against it.
5 brands supply electrical switch & relay parts for the 1966 Fiat 124, led by STANDARD MOTOR PRODUCTS (3 parts), ROSTRA (1 part) and HOLSTEIN (1 part), plus 2 more brands. Quality grades include Economy and Standard Replacement.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1966 Fiat 124. 1 part has it: STANDARD MOTOR PRODUCTS PS15T (Oil Pressure Sender / Switch). Each part number opens a page with every vehicle that part fits.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA | 600299 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS | HR106 | 🇺🇸 US | 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.
2 Horn Relay parts for the 1966 Fiat 124 come from 2 brands — ROSTRA and STANDARD MOTOR PRODUCTS.
Listed part numbers: ROSTRA 600299 and STANDARD MOTOR PRODUCTS HR106.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | PS15T | 🇺🇸 US | T-Series | View on Amazon |
| HOLSTEIN | 2OPS0073 | 🇺🇸 US | with Light | View on Amazon |
| UNITED MOTOR PRODUCTS | OPS4 | 🇺🇸 US | with Light | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | C8020 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS15 | 🇺🇸 US | Finish: Brass | View on Amazon |
This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.
5 Oil Pressure Sender / Switch parts are listed for the 1966 Fiat 124, from STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 1 other brand. STANDARD MOTOR PRODUCTS PS15T carries the "Popular" badge.
In the Economy grade, STANDARD MOTOR PRODUCTS, HOLSTEIN and UNITED MOTOR PRODUCTS supply 3 parts: the catalog's value-priced group. A representative part number is STANDARD MOTOR PRODUCTS PS15T.
The Standard Replacement section lists 2 options from ACDELCO and STANDARD MOTOR PRODUCTS — built to original-equipment specification. ACDELCO C8020 is listed in this group.
Listed part numbers: STANDARD MOTOR PRODUCTS PS15T, HOLSTEIN 2OPS0073 and UNITED MOTOR PRODUCTS OPS4, plus the other parts above.
Buying Electrical Switch & Relay Parts for a 1966 Fiat 124
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- Confirm you have the 1.2L L4 engine — every part on this page is matched to it.
- 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: Oil Pressure Sender / Switch and Horn Relay .
Frequently Asked Questions
How many electrical switch & relay parts fit the 1966 Fiat 124?
Our catalog currently lists 7 electrical switch & relay parts for the 1966 Fiat 124 across 2 subcategories and 5 brands, covering the 1.2L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 1966 Fiat 124?
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 1966 Fiat 124 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 1966 Fiat 124?
Every part on this page is matched to the 1.2L L4 engine. 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 1966 Fiat 124
Electrical Switch & Relay Parts for Other Fiat 124 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.