Do 99E 4X4 Have Front Wheel Speed Sensors? - Ford Powerstroke Diesel Forum

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post #1 of 12 Old 06-28-2014, 07:23 AM Thread Starter
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Do 99E 4X4 Have Front Wheel Speed Sensors?

Had my truck about a year. Been lurking here from time to time. I haven't found this discussed. I don't know my date, but it has the small brakes. There are sensor connectors behind the wheel wells, but nothing plugged into them.There are no signs that the knuckles have been molested and sensors removed.

My questions are:

Is this normal for the 99E to have the wiring, but not the front sensors?
If no sensors, is it 4 wheel ABS, or rear antilock only?
Any threads for additional information?

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post #2 of 12 Old 06-28-2014, 12:18 PM
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Mine does not have front ABS speed sensors, nor does it have a passenger side air bag. I really don't know at what point in the production run those two things were added to the Super Duty trucks, but for the front ABS my guess would be somewhere around April 99. That's when most of the other front end changes happened.
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post #3 of 12 Old 06-28-2014, 03:47 PM Thread Starter
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My engine date is Feb 08/1999.
I have passenger side airbag.
But definitely no sensors.

I'm more curious now as to how the anti lock functions. Must be rear-only. Can't be anything else without front sensors.
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post #4 of 12 Old 06-28-2014, 04:02 PM
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I think I read your post wrong, do you have a 99E, as in Econoline, or an E99, as in Early 99 Super Duty?
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post #5 of 12 Old 07-01-2014, 03:41 PM
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Not all trucks had 4 wheel anti lock brakes but might have the wiring. My late 99 has rear wheel antilock brakes, but I also have wiring connectors between the front wheel liner and body for the lighted step bars. Kinda weird.

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post #6 of 12 Old 07-01-2014, 04:17 PM
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Not all 7.3s had 4wheel abs. after 99 though IIRC they all had the wiring

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Quote:
Originally Posted by Solid98 View Post
Not all trucks had 4 wheel anti lock brakes but might have the wiring. My late 99 has rear wheel antilock brakes, but I also have wiring connectors between the front wheel liner and body for the lighted step bars. Kinda weird.
Have you verified those connectors are for courtesy lights? I have them as well, and always assumed they were for ABS, since they're in the same place as they are on trucks with front ABS. I'll have to get under there with a multimeter one of these days I guess.
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post #8 of 12 Old 07-01-2014, 05:47 PM
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Have you verified those connectors are for courtesy lights?
Yes, they have power when the doors are open. They extend from the rear of the inner wheel liners to the rocker panels.

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post #9 of 12 Old 07-01-2014, 06:22 PM
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Yes, they have power when the doors are open. They extend from the rear of the inner wheel liners to the rocker panels.
That's good to know. Thanks for that info!
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post #10 of 12 Old 07-02-2014, 10:30 AM Thread Starter
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The wires on my truck aren't for courtesy lighting. They are different colors than the courtesy light circuit, and are different colors on each side. Yellow on passenger side, tan on driver side. I would expect sensors to be different color wires side to side, courtesy lights, no. Courtesy light circuit is blu/blk, the other wire would be ground. (Ford ctsy lights are 'backwards' from pretty much every other manufacturer on earth. Ford switches the B+, everyone else switches the ground side).

My 99 Super Duty has factory running boards. But they don't have the lights I've seen on Expeditions and Excursions. I've never noticed that Super Dutys have the lights. I'll start looking for them. If they don't have the lights in 99, then why would they have connectors for them?

But the connectors on my Feb 99 Super Duty are not for lighting. No way. Not the right colors, and different colors on each side. Someday I'll put my signal tracer on them, and see where the other ends are.

I'd triple check what they are for before plugging lights into them. I'm pretty sure solid98 is not correct about their intended function.

Last edited by DaveP.; 07-02-2014 at 10:35 AM.
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