| Listed in parts books | Not catalogued by year yet |
BRAKE SWITCH 3TA/5TA COPY
Reproduction Lucas 31688 brake light switch, 6SA type, for Triumph 3TA/5TA, replacing the earlier 34381.
This is a reproduction brake light switch, Lucas 31688, built to the 6SA type pattern for Triumph 3TA and 5TA twins. It's a Sparx-made copy, sold under the SPX010 alias, and it lists as a direct replacement for the older Lucas 34381 that it supersedes.
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The switch's job is simple: it closes the circuit that lights the stop lamp when the rear brake is applied. On these bikes that's a mechanically-actuated switch tied into the rear brake linkage rather than a hydraulic pressure switch, since these are drum-brake, cable-operated machines.
Our catalog record on this one is thin beyond the basic description and the supersession link to 34381, so if you're matching it against what's currently on your bike, give us a call and we'll confirm before you order.
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