Cruise Control Issue

[bassplayer07]

So I've had my '95 Bronco for about 2 years now and there's been an on going issue that hasn't meant a lot to me. First off the speedometer doesn't work as smoothly as it should. When I accelerate the needle will increase at a steady rate and then just randomly start to bounce up about 2 to 10mph. I had thought maybe the sensor in the rear diff was bad and replaced it, but no luck. Also, when I try to use the cruise control it does basically the same thing as the speedometer. It'll go steady for a second or two and then speed up real fast and then slow down. I haven't used it since. It sure would be nice to be able to use it and have it work properly though. Any thoughts on what's up?

Thanks

Bryan

 

[racebreedbronco]

when you replaced the speed sensor did you notice and metal contamination in the diff fluid?? any rear axle noise??

 

[bassplayer07]

It didn't look like there was any contamination in the diff. I haven't heard any noise from it either. Sometime this week when I get a chance I'll take a look just to make sure.

 

[Seabronc]

Since both functions depend on the speed sensor to operate, I'd first check the harness from the speed sensor back to the cab. You may have a rub through high resistance short or an bad connector, (take them apart and make sure there is no corrosion and then re-seat them). It is possible you got a flaky sensor from whom ever you bought it from. Places like Auto Zone have a reputation for that with parts. I'd buy them from one of the reputable online sources or the local Ford dealer.

Good luck,

>-

 

[bassplayer07]

Since both functions depend on the speed sensor to operate, I'd first check the harness from the speed sensor back to the cab. You may have a rub through high resistance short or an bad connector, (take them apart and make sure there is no corrosion and then re-seat them). It is possible you got a flaky sensor from whom ever you bought it from. Places like Auto Zone have a reputation for that with parts. I'd buy them from one of the reputable online sources or the local Ford dealer.
Good luck,

>-

I bought the sensor from my local Ford store, so I'd like to think that the sensor isn't a flake.

 

[blkwlf]

you might want to have your PSOM checked, especially since its erratic and the cruise control feeds off of it

 

[miesk5]

Pointer Waiver TSB 96-21-11 for 92-96; "...The speedometer needle may waver and/or a light surge may occur on some vehicles when speed control is used at highway speeds between 80-113 km/h (50-70 mph). This may be due to slight dents/chips in either the exciter ring or the Vehicle Speed Sensor (VSS) and air gaps between the VSS and the exciter ring..."

Source: by Ford via miesk5

http://home.comcast.net/~miesk5/technical_...1%20for%2092-96