What is it?
01-23-2013, 01:44 PM
Fleet Mechanic
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What is it?
A friend has a 87 F150, I6 4spd 4x4 and it has what appears to be a vacuum switch on brake petal. It looks identical to the old 70s brake light switch, except it has a hose coming off it instead of wiring. Any idea as to what it is?
Sam
01-23-2013, 03:18 PM
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01-23-2013, 03:25 PM
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This^^^^ follow it and see were she goes.
01-23-2013, 04:28 PM
Fleet Mechanic
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Ok, will do the next time I see the truck.
Sam
01-23-2013, 04:33 PM
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I think that is to dump the vacuum to the cruise control.
01-23-2013, 04:34 PM
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It may be for a vacuum dump for cruise control, some of the older systems used this until they changed over to the electric one on the master cylinder.
01-23-2013, 04:39 PM
Fleet Mechanic
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That makes sense, this truck has cruise.
Sam
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