The sensors are pretty basic - a bare bit of metal that wears through to bring the light on.
So you just need to test for continuity on both sensors and the associated cables.
I made up a tester from the plug of an old worn out sensor - just soldered the connections together.
Plugging it in to each cable in turn quickly checks them out.
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Last edited by Mike Noc; 18th March 2017 at 08:00..
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