speedo has mind of its own

[mightymanx]

hiya can some 1 help my speeedo has a mind of its own as soon as istart moving it flaps all over the place i have tried a diffrent working set of clocks in it and it still does it i was going to change the cables will this fix it?

[James5]

hiya can some 1 help my speeedo has a mind of its own as soon as istart moving it flaps all over the place i have tried a diffrent working set of clocks in it and it still does it i was going to change the cables will this fix it?


Footwell earth point

[Phoenix Autosport]

Before you change the cables first try cleaning up all the connectors on the cable ends and make sure they are a good tight fit as they are often get loose or corroded causing intermittent problems

[mightymanx]

Footwell earth point

were is that located

[Spooky]

Can also be down to a ****ty timing sensor lead :coffee:

[mightymanx]

its had a new timeing sensor reently so i think thats ok:agree:

[Brigsy]

It will more than likely be the wiring, the connector near the passenger side strut turret that joins the speedo wiring to the box is usually to blame.

[Kris M]

were is that located i wonder if it could possibly be located in the footwell? ;)

[mightymanx]

i wonder if it could possibly be located in the footwell? ;)

lol yer guess so ive cleaned most eaths on a 5 b4 but not that 1 is it inside the car?

[mightymanx]

right my speedo still has a mind oif its own i have ut a brand new tdc sensor lead on i have cleaned the speedo cable by the passanger turret i have replaced both engine earths and its still flapping all over the place as soon as i start the car and rev it it moves like a rev counter and when am driving its bounceing every were aby ideas?

[adscan]

loose connection behind clocks? take the clocks out and give all the connections a clean.

[Fordy]

top tip for dash problems if all connectors are tight and you've soldered the strut connectors

a fine scotchbrite pad will clean all copper tracks nicely and safely

[5 turbo]

i had the same problom mine was the speedo needle was loose worth a look :scratch: migth need pushing back on

[mightymanx]

i have tried a diffrent set of workijng clocks in and cleaned the wire behind the clocks and its still doing it :scratch: anything else it could be??

[J$£5GTT]

you need to chop out that connector on the inside of passenger side in the bay,and just for now twist the wires together,check the whole length of that cable an see if it has cuts,burn marks or any suspect parts if so cut an rejoin it.

also check the probe goes all way in to the gearbox,maybe take it out and clean it.

if like you said you have tried another set of clocks and it still does not work after doing the above then suspect the sensor.

just source a donor one....thats what i would do.

:)

[mightymanx]

yep i tried a set of clocks i had in my last gtt and they was fine so cool ill give all that you said the the check :agree:

[adscan]

My speedo packed up today. :(
It has been jumping around a bit for a while. I checked the speedo cable and it looks very brittle.
How easy are these to replace?

[mightymanx]

never changed a speedo cable on a gtt before but it looks quite easy

[adscan]

Where does it go into the gearbox? And how easy is it to get to? I want to swap out the entire cable for a new one.