I need help, I have a 1995 f-150. I was driving on saturday and when I stopped at a stoplight my truck kinda bucked forward. I started driving and it did this two more times then out of nowhere the speedometer goes haywire and the odometer starts reading error. it did this for several minute and then went completely out. I got home and checked the fuses and all were ok but now when I turn the trucks ignition on the odometer just blinks random numbers and the speedometer does not work at all. I purchased a new speed sensor for the rear diff but it did not help. Any suggestions please.

Thanks

 

Sounds like the cluster is KO'D. I believe you can get one remanufactured from Ford for about 250.00. Might be worth the money to have a Ford Tech do a diag. Those random numbers are probably flash codes they can decipher.

 

Pick up a junkard cluster, $50-100. Worked for me.

 

Mine is junk too now. How can I reprogram the odometer so its teh same as mine. I dont want to get a used one that says I have 175k when I only have 118k. Please help

 

Federal law requires that the odometer in any replacement speedometer must register the same mileage as that registered on the removed speedometer/odometer. Service replacement speedometer/odometer and odometer modules with the mileage preset to actual vehicle mileage are available through Ford Electronic Service Centers. In nearly all instances, the mileage continues to accumulate in the odometer memory even if the odometer does not display mileage. This mileage can usually be verified by the electronic service centers. Contact the service center to receive a replacement speedometer/odometer or odometer module with the mileage preset to actual mileage.


If the actual vehicle mileage cannot be verified, the service center will supply a speedometer/odometer module with the odometer display preset to zero (0) miles and the service odometer segment (s) illuminated in the vicinity of the odometer display. In addition, an odometer mileage sticker is supplied with the replacement odometer. This sticker must display the estimated vehicle mileage and is to be affixed to the driver's door.
The speedometer is also used to provide a speed signal for correct operation of the vehicle's powertrain control module (PCM) (12A650), transmission (7003), and speed control (if so equipped). Because of this, it is very important to change the speedometer's internal conversion constant if the size of tires on the vehicle is changed. Changing the conversion constant to the proper value when the tires are changed will also ensure that the speedometer retains the original factory-set accuracy. The conversion constant can only be changed six times once the vehicle leaves the factory

 

Wow, now if i can figure out what that all means.
I am so confused and frustrated.

 

That means take to a dealer and get a remanufactured cluster ordered with the correct mileage on the odometer.

 

What about one from a salvage yard? There most be some other way. I cant afford a 375 dollar bill at the dealer (I checked).

 

It should work, just dont expect the odometer to match. Unless maybe the odometer unit is good in yours and you can somehow swap them out. Havent ever had to try.

 

That would be nice, if only my freaking speedo didn't jump aaround. What ever happend to the good o'l fashioned speedo cable. what was wrong with them. Ford and their stinking electrical crap. Dont get me wrong I love my truck but stuff like this just tickes me off. Hear I am trying to trade my truck for a truck with better milage and the cruze not working is realy hinduring everything. Well it works but it tries to keep up withe the speedo so the pedal just bounces too

 

You havent seen anything yet. The new trucks have the digital keys programmed to the cluster, a hybrid electronic cluster, and even some of the relays are integrated into the cluster. The cluster and the PCM have to agree with each other. Everything today is electronic and multiplexed. Might as well get used to it.

BUY EXTENDED WARRANTY!

 

O great. I hate being broke. Thanks for all the help. I think you are the only one that actualy knows something about this. Thanks

 

Woah woah woah. First off, don't go throwing money at the truck when you're not sure what the problem is. Those are not the characteristics these speedos show when they break. Before you go and buy something, look at the connector to the speed sensor for corrosion. Trace all the wires back as far as you can and check for cuts or broken wires. That signal is a pulse signal and is easily interupted. Also, pop the cover off the rear differential and check the tone ring. It's a thin gear toothed ring behind the ring gear. It it has any damage at all, it needs to be replaced. Now it could be the speedo being broken, but why throw money at it when you don't know for sure? Look at a post here, this is what the characteristics of a broken speedo are.

https://www.ford-trucks.com/dcforum/...ID39/3562.html

The reason they went to this over cable is because the cable gears notoriously break, they are not completely accurate, and they cannot be used to control electronic transmissions and cruise control.

 

The "error" in the odometer display tells you that it's not the ABS sensor in the rear axle - it's inside the speedo head. PSOMs do that when they die, but mine has survived a year or so in a junkyard before I installed it in my '83 cluster, where it's been for at least 5 years. You can get a junkyard speedo with fewer miles on it (the odo is integrated, so you can't move it) and then use a signal generator to run up the mileage to match yours. I've used my stereo to do it. Read this thread and look at this pic. It was taken with the PSOM hooked to the stereo recieving sound from the computer generated by the shareware program GoldWave.

 

But my truck runs perfect, theres nothing wrong with my abs, and it isnt reading error. It just bounces all over the place. I checked the sensor in the back. It was clean with NO chavings on it. The rear end makes no noise and the limited slip works flawless. Sometims when its bouncing i can hit one of the 2 buttons and it will make it work fine. So that realy makes me think it is the speedo. How can the heck can I tell what it is for sure. How can I check the rear sensor without taking the cover off.