The 1977 Triumph TR7 has 15 electrical switch & relay parts with verified fitment on this page — 3 part types and 8 brands, covering the 2.0L L4 engine. Each part includes a manufacturer part number and application notes.
On the 1977 Triumph TR7, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. All 15 listed parts are Oil Pressure Sender / Switch (9 parts), Brake Light Switch (4 parts) and Fuel Pump Cutoff Switch (2 parts).
Every part on this page is matched to the 2.0L L4 — the only engine offered in the 1977 Triumph TR7.
The most listed brands for 1977 Triumph TR7 electrical switch & relay parts are STANDARD MOTOR PRODUCTS (5 parts), BECK/ARNLEY (2 parts) and ROSTRA (2 parts), plus 5 more brands. Quality grades include Standard Replacement and Economy.
2 parts on this 1977 Triumph TR7 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including STANDARD MOTOR PRODUCTS PS15T (Oil Pressure Sender / Switch) and ACDELCO C8020 (Oil Pressure Sender / Switch). Click any part number to see every vehicle that part fits.
Brake Light Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 2010114 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| ROSTRA | 620153 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | SLS185 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS | 1S6955 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
4 Brake Light Switch parts for the 1977 Triumph TR7 come from 4 brands — BECK/ARNLEY, ROSTRA, STANDARD MOTOR PRODUCTS and 1 other brand.
This group includes BECK/ARNLEY 2010114, ROSTRA 620153 and STANDARD MOTOR PRODUCTS SLS185 and the remaining parts above.
Fuel Pump Cutoff Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO | D1876D | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS | FV7 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Fuel Pump Cutoff switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.
2 Fuel Pump Cutoff Switch parts for the 1977 Triumph TR7 come from 2 brands — ACDELCO and STANDARD MOTOR PRODUCTS.
This group includes ACDELCO D1876D and STANDARD MOTOR PRODUCTS FV7.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular | PS15T | 🇺🇸 US 🇨🇦 CA | T-Series | View on Amazon |
| HOLSTEIN | 2OPS0073 | 🇺🇸 US 🇨🇦 CA | with Federal Emissionswith Light | View on Amazon |
| UNITED MOTOR PRODUCTS | OPS4 | 🇺🇸 US 🇨🇦 CA | with Federal Emissions Systemwith Light | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | C8020 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| BECK/ARNLEY | 2010023 | 🇺🇸 US 🇨🇦 CA | Contains Light | View on Amazon |
| ROSTRA | 501419 | 🇺🇸 US 🇨🇦 CA | with Light | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS15 | 🇺🇸 US 🇨🇦 CA | Finish: Brass | View on Amazon |
| STANDARD MOTOR PRODUCTS | PS64 | 🇺🇸 US 🇨🇦 CA | with Lightwith California Emissions System | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | OS3537 | 🇺🇸 US 🇨🇦 CA | Combi Switch Function: Normally Closed | 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.
9 Oil Pressure Sender / Switch parts for the 1977 Triumph TR7 come from 7 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 4 other brands. The "Popular" part is STANDARD MOTOR PRODUCTS PS15T.
The Economy section lists 3 options from STANDARD MOTOR PRODUCTS, HOLSTEIN and UNITED MOTOR PRODUCTS — the catalog's value-priced group. STANDARD MOTOR PRODUCTS PS15T is listed in this group.
In the Standard Replacement grade, STANDARD MOTOR PRODUCTS, ACDELCO, BECK/ARNLEY and 1 other brand supply 5 parts: built to original-equipment specification. A representative part number is ACDELCO C8020.
1 further part sits outside the graded sections, with the same engine-level match.
This group includes STANDARD MOTOR PRODUCTS PS15T, HOLSTEIN 2OPS0073 and UNITED MOTOR PRODUCTS OPS4 and the remaining parts above.
Buying Electrical Switch & Relay Parts for a 1977 Triumph TR7
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 2.0L 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 Brake Light Switch .
Frequently Asked Questions
How many electrical switch & relay parts fit the 1977 Triumph TR7?
Our catalog currently lists 15 electrical switch & relay parts for the 1977 Triumph TR7 across 3 subcategories and 8 brands, covering the 2.0L L4 engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical switch & relay problems on a 1977 Triumph TR7?
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 1977 Triumph TR7 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 1977 Triumph TR7?
Every part on this page is matched to the 2.0L 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 1977 Triumph TR7
Electrical Switch & Relay Parts for Other Triumph TR7 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.