The 1966 Triumph TR4A has one listed electrical switch & relay part: Oil Pressure Sender / Switch from BECK/ARNLEY, covering the 2.1L L4 — the only engine offered in the 1966 Triumph TR4A. It includes a manufacturer part number and application notes.
On the 1966 Triumph TR4A, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
The part number opens a page with every vehicle that part fits.
Oil Pressure Sender / Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 2010031 | 🇺🇸 US | with Light | 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.
This group shows a single part: BECK/ARNLEY 2010031.
Buying Electrical Switch & Relay Parts for a 1966 Triumph TR4A
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 2.1L 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 .
Frequently Asked Questions
How many electrical switch & relay parts fit the 1966 Triumph TR4A?
This page lists one electrical switch & relay part for the 1966 Triumph TR4A: Oil Pressure Sender / Switch from BECK/ARNLEY, covering the 2.1L L4 engine.
What are the signs of electrical switch & relay problems on a 1966 Triumph TR4A?
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 Triumph TR4A 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 Triumph TR4A?
Every part on this page is matched to the 2.1L 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 Triumph TR4A
Electrical Switch & Relay Parts for Other Triumph TR4A Years
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