Tridon Stop Light Switch TBS025 1/2-20 UNF Normally Closed

The Tridon Stop Light Switch, part number TBS025, is a switch sold as each and identified with a 1/2-20 UNF thread and a normally closed circuit. It sits in the auto electrical accessories group and is listed under fuses, breakers, relays and switches, so it is the kind of component that needs careful matching before purchase.

This switch is supplied by Tridon and carries a two-year warranty. For buyers working through a brake light or stop light fault, the key identifiers here are the thread size, the circuit type, and the part number TBS025. Those details matter more than a general description when replacing an existing switch on a vehicle.

The product description is simply Tridon Stop Light Switch, which keeps the listing broad, but the actual serviceability check should be made against the thread specification and circuit operation. A 1/2-20 UNF threaded switch with a normally closed circuit will only suit applications that call for that exact style and function.

Because stop light switches are fitted in different ways depending on the vehicle and pedal or hydraulic arrangement, the safest approach is to confirm the old switch markings, thread dimensions, and wiring function before ordering. If the existing part is not TBS025, the physical thread and circuit type should still be treated as the main comparison points.

Key Features

• Tridon stop light switch
• Part number: TBS025
• Thread: 1/2-20 UNF
• Circuit: normally closed
• Sold individually
• Two-year warranty

Specifications

• Brand: Tridon
• Product type: Switch
• Unit of measure: Each
• Product description: Tridon Stop Light Switch
• Part No.: TBS025
• Thread specification: 1/2-20 UNF
• Circuit type: Normally closed
• Warranty: Two years

Fitment guidance

• Fitment information supplied includes Land Rover, Land Rover Defender, Land Rover Discovery, Land Rover Range Rover, Leyland-Innocenti, Leyland-Innocenti Mini, Leyland-Innocenti Moke, Rover, and Rover 2000-3500.
• Sample applications shown include Land Rover Defender, Land Rover Discovery 1989, Leyland-Innocenti Mini 1969 to 1979, and Rover 2000-3500 1968 to 1978.
• Fitment should still be confirmed against the thread size and the normally closed circuit before purchase, as the application list is broad and should not be treated as a substitute for checking the existing switch.

Application and Buying Notes

When replacing a stop light switch, the first checks should be the part number TBS025, the 1/2-20 UNF thread, and the normally closed circuit. Those are the most useful identifiers in this listing and the best starting point for matching the switch to the vehicle already in service.

A stop light switch can be similar in appearance to other switches but still differ in thread pitch and circuit operation. This one is specified as normally closed, so it should only be selected where that switching action is required by the vehicle’s wiring or brake light control arrangement.

The listed fitment references Land Rover, Leyland-Innocenti and Rover applications, including Defender, Discovery, Range Rover, Mini, Moke and Rover 2000-3500 families. Even with those references, the correct approach is to compare the removed switch, the mounting thread, and the electrical function rather than relying on the vehicle name alone.

The warranty period is two years, which gives a clear commercial term for the part, but warranty does not replace fitment checking. For a switch like this, the practical compatibility point is whether the vehicle needs a 1/2-20 UNF threaded, normally closed stop light switch and whether the connector and mounting arrangement suit the existing setup.

If you are uncertain, measure the old switch thread and note how the circuit behaves in its resting state. Those details, along with TBS025, provide a more reliable buying check than the model name alone and help avoid ordering a switch that physically fits but functions differently.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number TBS025 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type SWITCH, Unit of Measure EACH, Warranty Two Years, Product Group 1 AUTO ELEC ACCESSORIES, Part No. TBS025, Brand TRIDON, Description Tridon Stop Light Switch, Product Group 2 FUSES BREAKERS RELAYS SWITCHES.

Tridon Stop Light Switch. Part number TBS025 should be checked first. These details form the core reference points used by parts interpreters when confirming the correct replacement.

For part number TBS025, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a switch in workshop, fleet, trade, agricultural, or construction service, the listed electrical specification should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include LAND ROVER DEFENDER, LAND ROVER DEFENDER 1990, LAND ROVER DEFENDER 1991, LAND ROVER DEFENDER 1992, LEYLAND-INNOCENTI MINI, LEYLAND-INNOCENTI MINI 1969. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm compatibility using part number TBS025, the 1/2-20 UNF thread, and the normally closed circuit type before ordering. The vehicle application list should be used as a guide only, not as a guarantee of fit.

FAQ

What is the part number for this stop light switch?

The part number is TBS025.

What thread size is listed for this switch?

It is listed with a 1/2-20 UNF thread.

What type of circuit does this switch use?

It is specified as normally closed.

Which brand is this switch?

The brand is Tridon.

Is this switch sold as a pair or individually?

It is sold as each, meaning one switch per order unit.

What should I check before ordering?

Check the part number TBS025, the 1/2-20 UNF thread, and the normally closed circuit, then compare them with the removed switch and the vehicle application details.