Speedometer not working

Tiny
BLACKOP555
  • EXPERT
Sounds like it may be a damaged VSS (vehicle speed sensor) wiring harness check all connectors, wirings try wiggling and seeing if that changes the performance.
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Monday, November 26th, 2018 AT 9:36 AM (Merged)
Tiny
GUSLEO
  • MEMBER
I have replaced the speed sensor and checked the connections into the speedometer with no improvement.

Where do I go next.
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Monday, November 26th, 2018 AT 9:36 AM (Merged)
Tiny
BLACKOP555
  • EXPERT
In response to your email here is my new suggestion so I can give you some "substance" remove the vss and check the drivegear for wear or other defects first of all, common problem with that year of f150s.

If that is good check the internal drive gear thats inside of the transmission.

If that is good check the PSOM and do a PIN to PIN wiring harness also, check power, if none check fuse first and work way down, also check for ground.

If that checks good then the brain is no more good and will need replacement and a good relearn.
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Monday, November 26th, 2018 AT 9:36 AM (Merged)
Tiny
HOAGS69
  • MEMBER
  • 1997 FORD F-150
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 238,000 MILES
I recently changed my insturment panel bulbs this past sunday and, and when I went to drive off with my truck I realized my gauges are not working. None of my needles are moving, same with the speedometer. Is this something I have done? I checked the fuse and it still looks brand new.
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Monday, November 26th, 2018 AT 9:36 AM (Merged)
Tiny
JAMES W.
  • MEMBER
Check to make sure the main connector to the back of the dash is seated all the way. You may have knocked it loose changing bulbs.
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Monday, November 26th, 2018 AT 9:36 AM (Merged)
Tiny
HOAGS69
  • MEMBER
I realized that when I was fiddling around with it. It is working now. Thanks.
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Monday, November 26th, 2018 AT 9:36 AM (Merged)
Tiny
JAMES W.
  • MEMBER
Glad to help and thanks for your donation. We moderators appreciate it, Jim
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Monday, November 26th, 2018 AT 9:36 AM (Merged)
Tiny
SEAN080844
  • MEMBER
  • 1998 FORD F-150
  • V8
  • 4WD
  • MANUAL
  • 150,000 MILES
My speedometer wont work. The vss is good and the cluster is good. I havent checked the harnass on the vss or the harness on the cluster for voltage but if they both do have voltage what else could be the problem?
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
Hello and thanks for donating

Does the speedometer read inaccurately, bounce around or not work at all? It is very possible that the little gears on the transmission that run the VSS have been damaged and are no longer giving the info. To the sensor. With the sensor itself being good, instrument cluster good and assuming wiring is good, I would put my money on that being the issue. You will want to check fuses if there is no voltage somewhere though.
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
BIRD36459
  • MEMBER
  • 1990 FORD F-150
1990 Ford F150 6 cyl Four Wheel Drive Manual

The speedometer on my truck stopped working a while back and for a while it would jump when I would slow down or push the clutch. Now it doesnt work at all. I have replaced the cable and the gear and after each it would work for about a day then stop working completely. Can you please help me figure out whats going on with it?
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you rechecked your work and parts you replaced? I ask because if the cable and the gears are both good, then chances are the speedo itself is bad.

Let me know.

Joe
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
BIRD36459
  • MEMBER
No I changed the speedometer so its new. Could it be the gear in the transmision?
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
I thought you replaced the gear in the trans? If you haven't, yes it could be bad. I believe it is a nylon gear.
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
LORRIEHAVNFUN
  • MEMBER
  • 1977 FORD F-150
  • 120,000 MILES
I have a Ford F-150 and my speedometer is not working. I know it's not electrical, but I don't know how to pull out the speedometer to figure out what is wrong with it. Please help me. I don't really have the money to pay someone to fix it. Thank you.
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
CARADIODOC
  • EXPERT
The speedometer head is the last thing to suspect. The exception would be if the odometer still works.

First suspect the cable. They can snap or the square end at the transmission can round off inside the gear. You may be able to reach behind the instrument cluster to disconnect the cable, then watch or feel if it turns when you move the truck. It's often easier to disconnect the cable at the transmission, then spin it with your fingers while a helper watches the speedometer. That's also the time to inspect the end to see if it's rounded off.

The gear inside the transmission could be stripped too but that's not as common as a snapped cable. If the odometer does work, that would prove the cable and gears are okay. Usually when the speedometer head fails it gives a lot of warning first. The needle will typically bounce around a lot and the assembly will make noise. On rare occasions the head can lock up and cause the cable to snap, so if you find the cable is badly twisted, check the replacement for free movement with your fingers. A locked-up factory cruise control servo can do that too. They were run by the speedometer cable.
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
LORRIEHAVNFUN
  • MEMBER
I understand this part. But how do I get to the speedometer cable to fix it. My problem is I am not sure how to get to the cable to check it. If you could please send me that information I would appreciate it.

Thank you.
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
CARADIODOC
  • EXPERT
If you're not familiar with what a speedometer cable looks like your best bet is to get a copy of the manufacturer's service manual. There will be line drawings and a description of how to remove the end from the transmission. You might find it on one of the online service manual companies too. My computer won't let me access them. I've never figured out why and I gave up trying a long time ago.

All of the speedometer cables in the '70s and '80s were pretty basic. Most had a metal cap that screwed onto the transmission. Typically you will need a pair of pliers to loosen it, then you just unscrew it and pull the cable off. You'll see the spiral-wound cable inside the casing. Spin that cable with your fingers while a helper watches the speedometer. If the needle flickers, the cable is okay.
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
PSTULKEN
  • MEMBER
  • 1998 FORD F-150
Electrical problem
1998 Ford F150 V8 Four Wheel Drive Automatic 164 K miles

The speedometer has stopped working. What could cause that to happen? Thanks.
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Have the Vehicle Speed Sensor (VSS) checked.

Let me know what you find.

Joe
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Monday, November 26th, 2018 AT 9:37 AM (Merged)
Tiny
PSTULKEN
  • MEMBER
I did replace a VSS and had no response from the speedometer. I noticed 2 types of VSS and the one I replaced was more elongated than the other one which was a ABS VSS. Any ideas now?
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Monday, November 26th, 2018 AT 9:37 AM (Merged)

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