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Should the "shuttle" (I guess that's what you call it) always be centered in the distribution block? I understand that if it comes in contact with the brake light sensor, it will complete a circuit and turn the light on. What confuses me is, if it is always supposed to be centered, what is its purpose other than a light sensor?
 

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Andy,

The shuttle should always be centered unless there is a problem, and should be recentered after a problem is fixed. The shuttle doesn't exactly make the contact, what it does is depress the plunger in the brake warning light switch which then closes its two contacts. That is the shuttles only purpose, to actuate the brake warning switch in the event that one of the two brake circuits loses pressure.

Regards,

Bob
 

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Only problem is that i tried that centralizing thing and it did not work. I think that they may get stuck to the point you have to take them apart and rebuild it.
 
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