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Along the driver side rail is the ABS master control unit. from there a brake line goes to a small part with an electrical connection and has a round metal base that attaches to a brake line "brass t" then the line goes to the front wheels. I can't seem to find what this called.
Apparently I can't load a picture. I have tried 2x but it never attaches to this post.
I changed from Brave browser to Chrome and the image is below.
Thanks because this vehicle had cruise but it does not work currently. I did find a part number on that blue tag #9f924 which brings up similar parts... I am researching it now.. but Thank you so much!
Not adding anything to the question at hand, just thinking out loud.
So if there’s no brake fluid pressure, stepping on the brake pedal won’t disengage cruise control? There has to be more to the circuitry. Like if you apply the brakes and the sensor doesn’t pick up increased brake fluid pressure it’ll disable cruise control until the fault is reset.
I don't have any service manuals from the 1990s but, from the 2002 service manual:
"Normally, when the brake pedal is depressed, the speed control module deactivates the speed control system. Under increased brake pedal effort, the deactivator switch, a normally closed switch, will open and remove power to the speed control servo clutch, releasing the throttle independent of the speed control module."
From the Vehicle Speed Control Wiring Diagram Overview page:
It is the BOO (brake on / off) switch that the processor uses for many functions including cruise dump
You will have trouble with it disconnected.
The trans will shift funky and the cruise will likely not set
Just to be clear, the BOO (Brake On Off) switch is the same as the BPP (Brake Pedal Position) switch, not the hydraulic pressure switch that started this thread.
The BOO switch is (as shown on the attached Ford wiring diagram) "Closed with brake pedal depressed".
The "Deactivator Switch" shown in the Speed Control Diagram (see post #10 in this thread) opens with 125+ psi in the brake line.
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1992 E350 Brake part Identification
SOLVED !!! Thanks
