10 Electrical switch & relay parts are listed for the 1949 Hudson Commodore Series, in 4 part types, covering both the 4.2L 254cid L8 and the 4.3L 262cid L6. Each one has a brand, a manufacturer part number and notes that say where it fits.
The switch and relay system on the 1949 Hudson Commodore Series covers the switches, relays and flashers that route power to everything the driver touches. The largest groups are Oil Pressure Sender / Switch (5 parts), Brake Light Switch (2 parts) and Horn Relay (2 parts). The other 1 part type covers the remaining 1 part.
The 1949 Hudson Commodore Series was sold with both the 4.2L 254cid L8 and the 4.3L 262cid L6. All 10 parts on this page fit every engine.
The most listed brands for 1949 Hudson Commodore Series electrical switch & relay parts are STANDARD MOTOR PRODUCTS (6 parts), ROSTRA (1 part) and HOLSTEIN (1 part), plus 2 more brands. Quality grades include Economy and Standard Replacement.
1 part on this 1949 Hudson Commodore Series page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — STANDARD MOTOR PRODUCTS PS15T (Oil Pressure Sender / Switch). Click any part number to see every vehicle that part fits.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 1949 Commodore Series engines | SLS27T | 🇺🇸 US | T-Series | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 1949 Commodore Series engines | SLS27 | 🇺🇸 US | 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.
2 Brake Light Switch parts for the 1949 Hudson Commodore Series come from STANDARD MOTOR PRODUCTS. Every part fits both the 4.2L 254cid L8 and the 4.3L 262cid L6.
The Economy section lists 1 option from STANDARD MOTOR PRODUCTS — the catalog's value-priced group. STANDARD MOTOR PRODUCTS SLS27T is listed in this group.
In the Standard Replacement grade, STANDARD MOTOR PRODUCTS supplies 1 part: built to original-equipment specification. A representative part number is STANDARD MOTOR PRODUCTS SLS27.
This group includes STANDARD MOTOR PRODUCTS SLS27T and STANDARD MOTOR PRODUCTS SLS27.
Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 1949 Commodore Series engines | DS40 | 🇺🇸 US | View on Amazon |
This table covers the dimmer switches that select headlamp high and low beam. 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.
One part is listed for the 1949 Hudson Commodore Series — STANDARD MOTOR PRODUCTS DS40.
Horn Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA Fits: all 1949 Commodore Series engines | 600328 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: all 1949 Commodore Series engines | HR114 | 🇺🇸 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 are listed for the 1949 Hudson Commodore Series, from ROSTRA and STANDARD MOTOR PRODUCTS. All of them fit every engine offered in the 1949 Commodore Series.
Listed part numbers: ROSTRA 600328 and STANDARD MOTOR PRODUCTS HR114.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: all 1949 Commodore Series engines | PS15T | 🇺🇸 US | T-Series | View on Amazon |
| HOLSTEIN Fits: all 1949 Commodore Series engines | 2OPS0073 | 🇺🇸 US | with Light | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: all 1949 Commodore Series engines | OPS4 | 🇺🇸 US | with Light | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: all 1949 Commodore Series engines | C8020 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 1949 Commodore Series engines | 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 for the 1949 Hudson Commodore Series come from 4 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, UNITED MOTOR PRODUCTS and 1 other brand. The "Popular" part is STANDARD MOTOR PRODUCTS PS15T. Every part fits both the 4.2L 254cid L8 and the 4.3L 262cid L6.
The Economy section: 3 options from STANDARD MOTOR PRODUCTS, HOLSTEIN and UNITED MOTOR PRODUCTS. STANDARD MOTOR PRODUCTS PS15T is listed in this group.
Standard Replacement: 2 parts, from ACDELCO and STANDARD MOTOR PRODUCTS. A representative part number is ACDELCO C8020.
Part numbers include STANDARD MOTOR PRODUCTS PS15T, HOLSTEIN 2OPS0073 and UNITED MOTOR PRODUCTS OPS4, among others listed above.
Buying Electrical Switch & Relay Parts for a 1949 Hudson Commodore Series
On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.
- You do not need to pick an engine: every electrical switch & relay part on this page fits both the 4.2L 254cid L8 and the 4.3L 262cid L6.
- 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 1949 Hudson Commodore Series?
Our catalog currently lists 10 electrical switch & relay parts for the 1949 Hudson Commodore Series across 4 subcategories and 5 brands, covering both the 4.2L 254cid L8 and the 4.3L 262cid L6. Each part is matched to the engine(s) it fits.
Do electrical switch & relay parts differ between 1949 Hudson Commodore Series engines?
No. On this page every electrical switch & relay part fits both the 4.2L 254cid L8 and the 4.3L 262cid L6. You do not need to pick an engine to choose the right row — use the notes for position and trim.
What are the signs of electrical switch & relay problems on a 1949 Hudson Commodore Series?
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 1949 Hudson Commodore Series 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 1949 Hudson Commodore Series?
Every part on this page already fits both the 4.2L 254cid L8 and the 4.3L 262cid L6. 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 1949 Hudson Commodore Series
Electrical Switch & Relay Parts for Other Hudson Commodore Series Years
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