Search



Go Back   MustangForums.com > Ford Mustang Tech > V6 (1994-2004) Mustangs
Sign in using an external account
Register Forgot Password?
Search

V6 (1994-2004) Mustangs Technical discussions on the 3.8L and 3.9L V6 torque monsters
Sponsored by Optima Batteries


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 07-10-2013, 04:01 PM   #1
zipzit
 
Join Date: Jul 2013
Vehicle: 2001 Ford Mustang v6
Location: Nevada
Posts: 15
Default Two Electric Switches on Brake? (BOO)

I'm helping youngest step son with some brake light issues, 2001 Model Year V6 Mustang. Topic = Brake On / Off switch, also known as the BOO switch.

As I understand it, an electric brake light switch does three things:
--Tells the cruise control to shut off when pedal is pressed.
--Turns on the brake lights when pedal is pressed. (duh!)
--Disengages the Transmission Park interlock, such that you can only shift from park to drive when the brake pedal is pressed.

That stuff totally makes sense.

What I'm very confused about is there are two (count 'em TWO) electric switches on the 2001 Mustang. There is a large plastic blue/white switch located up high on the brake pedal, and a smaller black switch located lower just above the drivers foot. The blue/white plastic switch has a large molded in place plastic split pin that mounts into a round hole, and the lower part of the switch is a white plastic cylinder with a C shaped molded end that snaps onto a yellow plastic pin. Blue/White switch wires are green / brown at a short pigtail and they switch at an inline hardshell connector to green/r and orange/XXX. (I only have one photo, car is not here..) The black switch mounts to a welded rod, retained with a yellow spring type cotter pin. Black switch wires = LG/R and R/LG

I'm pretty sure the blue/white switch controls the brake lights and shift interlock, and I presume the other switch is for cruise control shut off. The push rod on the blue/white switch has a little bit of adjustment built into it.

I've worked on this before, but now stepson has the car out of state, experiencing new issues with brake lights and interlock.

I'm assuming there are two switches there because of a late content addition to the model year, probably the shift interlock. (Been there, done that.. I worked for Uncle Henry in Dearborn for 29 years in engineering, new model launch, etc...)

Anybody know the wiring diagram for these two switches? If I was still in Michigan I'd hop right over to the Ford Research Center library and look up the Electrical and Vacuum Troubleshooting Manual (EVTM) for this model, but alas I'm now living in Vegas.

Is there any ties between the two switches? Are these two independent switches wired totally separately or is there some sort of tie in between the two?

I've got a Haynes manual, but for this, the schematics are not all that great. They show two different switches on different pages, with EXACTLY the same colors, so I can't tell much from there.

I fixed this a month ago, by simply reseting the self adjust feature on the blue white switch. The car was pretty low on brake fluid, pedal had pretty long travel. Refilled the brake fluid, reset the blue/white switch self adjust travel feature short. Not sure what's going on now. Stepson swears the black switch is inop. I doubt it but I'm not really sure... He's just learning basic electricity and how to use the volt ohm meter.

Car now has no brake lights, no shift interlock control.

Anybody been here, done this before?

thanks,
zip.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
zipzit is offline   Reply With Quote
Old 07-10-2013, 04:01 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Tags
boo switch, brake lights, interlock

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 12:28 AM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup