1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

What is it?

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Old

Jan 23, 2013 | 01:44 PM

#1

Rusty_Old_F250

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Fleet Mechanic

Joined: Aug 2009

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From: Western Washington

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

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Old

Jan 23, 2013 | 03:18 PM

#2

Diesel_Brad

Fleet Owner

Joined: May 2009

Posts: 21,437

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From: Gilbert, PA

Did you trace it back?

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Old

Jan 23, 2013 | 03:25 PM

#3

stewart89

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Joined: Oct 2012

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This^^^^ follow it and see were she goes.

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Old

Jan 23, 2013 | 04:28 PM

#4

Rusty_Old_F250

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From: Western Washington

Ok, will do the next time I see the truck.

Sam

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Old

Jan 23, 2013 | 04:33 PM

#5

jas88

Lead Driver

Joined: Feb 2002

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From: Greater Austin, Texas

Club FTE Silver Member

I think that is to dump the vacuum to the cruise control.

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Old

Jan 23, 2013 | 04:34 PM

#6

White 97 xlt

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Joined: Aug 2005

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From: Cleveland, TN

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.

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Old

Jan 23, 2013 | 04:39 PM

#7

Rusty_Old_F250

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From: Western Washington

That makes sense, this truck has cruise.

Sam

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