SPEED CONTROL PROBLEM
Fleet Owner
Joined: Apr 2008
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Okay I just took a look at the diagram and there's 2 sets of contacts built into the brake switch. The first set only controls brake lights. The second set does everything else like activate the ABS, control the brake(or shifter) interlock, and deactivate the cruise control. So if the second set of contacts are stuck closed the CC won't work and the shifter will move without having to press the brake. The wires you need to look at the go to the brake switch are RD/WH which is a constant +12 volts from fuse #5 and the RD/LG which should have +12 only when the brake pedal is pressed.
Fleet Owner
Joined: Apr 2008
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I've attached a PDF of the diagram so you can see what I'm looking at.
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Cross-Country
Joined: May 2011
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my BPS has also four cables. In accordance to the wiring diagram, Pin 1 (LG/RD) and Pin 5 (RD/WH) are hot at all times. Checked and yes, they are hot. The other both, Pin 2 (LG) and Pin 6 (RD/LG) are hot, in the moment when i press the pedal. Pin 3 and 4 are unused.
But, i found out, that the Door Auto lock not work. Don´t know, since when, but the locking system needs a speed signal, also the cruise control. maybe it is the same problem. Found out in the WWW, that the Expedition/Navigator has problems with the CJB and the non serviceable relays. May the Relay is blown out?
But, i found out, that the Door Auto lock not work. Don´t know, since when, but the locking system needs a speed signal, also the cruise control. maybe it is the same problem. Found out in the WWW, that the Expedition/Navigator has problems with the CJB and the non serviceable relays. May the Relay is blown out?
Fleet Owner
Joined: Apr 2008
Posts: 24,318
Likes: 5,128
From: 0,0,1
For that matter it could also be a problem with the output speed sensor not sending a signal.
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Apr 22, 2008 02:16 PM
