Question about 1999 Ford Expedition

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Rear anti lock brake light & brake light on in 1991 ford 350e m/h

Motor home rear passenger tires hotter than drivers side rear

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  • Ford Master
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If the brake light and alb lights are on u need to get it checked out, as this is a warning of a brake problem, and u could find yourself w/out brakes.
1st check the easy things, is tire pressure what it should be in the rear tires? Low pressure on one side would result in the tire running hotter than the other properly inflated side. Is the emergency brake completely off? If on even slightly, it can turn on the brake light. Is brake fluid at the proper level? If low, the brake light will go on. If it's low, u must check for leaks to see why it's low. The abs light on indicates a problem w/ the system, it could be as simple as a broken wire at the rear wheels. u may also have a brake dragging on the rear pass. side, causing the brakes to overheat, which could result in heat transfer to the wheel, and then the tire. This can be checked by jacking up the vehicle (~if u have a sturdy enough jack), and with front wheels blocked front and back, in neutral, engine off, turn wheels in back, see if resistance to turning is the same, or if brakes are dragging, u should be able to tell. Let me know how u make out.

Posted on Dec 30, 2008

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Anti-Lock Control —Vehicles Built After 03/2002 The 3-channel anti-lock brake system consists of the following components:
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The 4-channel anti-lock brake system with traction control and stability assist system consists of the following components:
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---------------------------------------------------------------------
I suspect the abs issue is causing the speed control not to work if it happened at the same time the cruise control stopped working. When the yellow ABS light comes on, it means the ABS is dactivated. You may have a faulty accelerometer which senses acceleration and yaw (side to side lean). I have not seen a bad one but you said it is sensitive to acceleration.
I would unplug it and see what happens. The connector should have a small tab to depress so you can pull the connector out.
Here is where it is:

Accelerometer Removal and Installation
  1. NOTE: The accelerometer is located under the center, rear passenger seat carpet. (I think you have to remove seat for access).
    Cut the carpeting along the perforations.
  1. Disconnect the electrical connector.
  1. Remove the nuts and remove the accelerometer.
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Have dealer hook up tester and pull fault codes if you can't find an easy solution.
Some background info
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  • Malfunctions are indicated by the yellow ABS warning indicator in the instrument cluster.
  • The anti-lock brake system is self-monitoring. When the ignition switch is turned to the RUN position, the anti-lock brake control module will carry out a preliminary self-check on the anti-lock electrical system indicated by a three-second illumination of the yellow ABS warning indicator in the instrument cluster.
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  • Each time the vehicle is driven, as soon as vehicle speed reaches approximately 20 km/h (12mph), the anti-lock brake control module turns on the pump motor for approximately one-half second. At this time, a mechanical noise may be heard. This is a normal function of the self-check by the anti-lock brake control module.
  • Pedal pulsation coupled with noise while braking on loose gravel, bumps, wet or snowy roads is normal and indicates correct functioning of the anti-lock brake system.
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    The anti-lock brake system (ABS) uses the yellow ABS warning indicator to alert the driver of a malfunctions in the ABS.
    The yellow ABS warning indicator will come on to warn the driver that the ABS has been turned off due to a symptom that exists in the ABS. Normal power assist braking remains but wheels can lock during a panic stop while the yellow ABS warning indicator is illuminated.

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    Please report back, I am curious if that is what it is. Good luck

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    Rear brake light & brake light on in 1991 ford 350e motor home


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