Brake light switck

arcturus · May 14th, 2019, 20:31

Getting ready to fit new master cylinder. Is there a polarity issue here? I think not but just want second opinion

Ron Kwas · May 14th, 2019, 21:31

Arcturus;

Short answer: No

Long Explanation: Switch with single contact (like oil pressure) makes a connection to chassis, and you could verify this with a continuity tester. Two contacts on switch, mean there is an isolated contact inside (which you could also verify with a continuity test from each terminal to chassis), and you can connect the two wires from harness either way...but I'm sure by now you know how I feel about the pressure sensing switch...activated by that switch, please check your Brakelight function often, and consider adding a Pedal Position Sensing Switch! See: http://www.sw-em.com/safety_bulletin_1.htm

Cheers

May 14th, 2019, 21:31	#2
Ron Kwas Premier Member Last Online: Today 02:57 Join Date: Jul 2007 Location: Connecticut, USA	Arcturus; Short answer: No Long Explanation: Switch with single contact (like oil pressure) makes a connection to chassis, and you could verify this with a continuity tester. Two contacts on switch, mean there is an isolated contact inside (which you could also verify with a continuity test from each terminal to chassis), and you can connect the two wires from harness either way...but I'm sure by now you know how I feel about the pressure sensing switch...activated by that switch, please check your Brakelight function often, and consider adding a Pedal Position Sensing Switch! See: http://www.sw-em.com/safety_bulletin_1.htm Cheers Last edited by Ron Kwas; May 14th, 2019 at 21:34.

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