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        General >> Problems >> Speedo Needle Stuck
        
(Message started by: Paul B on May 16^th, 2007, 6:35pm)

Title: Speedo Needle Stuck
Post by Paul B on May 16^th, 2007, 6:35pm

As per title.. its stuck... right round at the maximum.

It happened when the needles all spun round through having a dead battery.
But the speedo one won't come back.

I know someone had this problem before. Long time ago though. How do I fix it? ???

Title: Re: Speedo Needle Stuck
Post by Dave2302 on May 16^th, 2007, 6:40pm

Hi,

Remove clock set, turn it upside down and thump it ! Not too hard LOL, then if it returns freely refit it all. Switch ignition on before putting all the trim back in, in case it sticks again.

Regards Dave

Title: Re: Speedo Needle Stuck
Post by Snoopy on May 16^th, 2007, 7:42pm

Fist things fist ... HAVE you tried a reset ! i.e. going through the dashboard check things using the trip button and then switching off and then back on , That can sometimes free it off.

Title: Re: Speedo Needle Stuck
Post by scorpio_man on May 16^th, 2007, 7:50pm

hi there

ford says not to turn it up side down.

easiest way is to take off the 'wooden' surround,
then the 4 screws to the dash 'glass'.

reset the dash again and replace everything.

hth

Title: Re: Speedo Needle Stuck
Post by Paul B on May 16^th, 2007, 10:43pm

I haven't done the dash diagnostic thing, no.

All I've done so far is disconnect & reconnect the battery to get them flicking.

Oh, and I've given the dash top a technical whack too ;)

I'll try the reset in the morning. Then I guess its off with the 'wood'

Title: Re: Speedo Needle Stuck
Post by heliphil50 on May 17^th, 2007, 8:19pm

Hi the first time when my speedo did the same thing i thought i would have to take out the dash i started to remove it got the wood off and tried a reset and it worked. my battery went down after not using the car last week and had to boost it and speedo stuck again heres how i did it this time switch ign on hold reset button till mileometer changes to test switched of ign and on again speedo reset now fine again

Title: Re: Speedo Needle Stuck
Post by ragnor on May 18^th, 2007, 2:47pm

Hi all, I've got a scorpio 2Lt 1995 mod. i've got a prob with the speedo not working. When batt removed and reconected the needles on both the speedo & rev-counter flick & come to rest but when driving speedo don't work. Having looked through the other postings I took it that the V.S.S was not working. Having change this unit it speedo still not working. Is there a way of testing the unit or is it a matter of change unit & hope 4 the best? I'd like to take the car 4 a drive it's past the M.O.T but these probs have croped up. Any & all advice would be very helpfull. Ragnor33 (newboy) (Not only to the forum but to scorpios as well)

Title: Re: Speedo Needle Stuck
Post by Kjetil S on May 18^th, 2007, 3:45pm

@Ragnor
Could very well be loom problems. There is a set of wires going from the VSS on the gearbox, and up along side the engine, left hand side when looking from the front. I had to change these on mine (Speedo and reverse lights were dead). Got a second hand one off a member here. Takes half an hour to change.

Check if your reversing lights work, if not, then all my bets are on that loom.

Title: Re: Speedo Needle Stuck
Post by ragnor on May 18^th, 2007, 4:32pm

2 kjetil. Reverse lights are working but still no speedo any other thoughts on this prob? Thanx for the input. (This is an ex site 4 info, expertise better than most garages). Ragnor.

Title: Re: Speedo Needle Stuck
Post by Kjetil S on May 18^th, 2007, 5:41pm

It could still be the loom, but just less likely. If you have the tools, you can get underneath and use a multimeter on the loom, to check for continuity. If you disconnect both ends, you could try grounding one side and put the meter on the other side. That won't uncover poor insulation, but it should uncover continuity problems.

Title: Re: Speedo Needle Stuck
Post by TiberiuS on May 18^th, 2007, 5:45pm

Hi Ragnor, is it an auto? bad signal from the VSS will also mess up gearchanges so if it's an auto and it's changing gear ok, your problem lays elsewhere in the circuit. Could even be a fault in the instrument cluster but it's an expensive thing to change, even second hand. As Kjetil says though, it could be a wiring problem - your is an early car and the looms are prone to becoming brittle and damaged with age.

If you can get hold of a scope, you could check for the square wave signal the VSS sends at the ECU, this would mean both the sensor and loom were working ok.

Good luck.

Regards, Bruce.

Title: Re: Speedo Needle Stuck
Post by ragnor on May 18^th, 2007, 6:35pm

Thanx for the info (both)! Will try your surgestions some time this week end. (After my sons finished racing his mini stocks), this means i'm working in the dark (ha ha) either way.
Once again thanx. Ragnor.

Title: Re: Speedo Needle Stuck
Post by harry.m1byt on May 19^th, 2007, 9:58am

on 05/16/07 at 18:35:43, Paul B wrote:

As per title.. its stuck... right round at the maximum.

I think you will find it is stuck behind the pin at minimum rather than maximum.

The pin stop is a flexible plastic and what worked once for me was to drive it, giving the top of the dash a good thump at speed.