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#1621256 - 02/06/2018 12:10 Speedometer not working
robbie_1961 Offline
Newbie

Registered: 03/08/2006
Posts: 12
Loc: Chelmsford, Essex. England
Hello All. After a winter lay up I noticed that my speedo isn't working and neither is the mileometer. This is on a 2000 turbo plus 6 speed. No other faults.

I suspect a bad sensor or poor connection or mice but I am unable to locate the sensor. I have removed the battery and tray and can see the reverse sensor but not the speedo. It must be around here somewhere but I can't find it. Can someone point me too it or perhaps have a photo of where it lives? I have looked in the manual under gearbox removal and it gets a mention but I can't understand the simple line drawing that goes with it.

Kind regards,
Rob

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#1621292 - 03/06/2018 11:57 Re: Speedometer not working [Re: robbie_1961]
GrahamL Offline
Forum is my job

Registered: 17/12/2005
Posts: 3582
Loc: Pothole City
It's more down the back on the diff, easier to get from below. Near the end of the dipstick tube.

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#1621298 - 03/06/2018 14:32 Re: Speedometer not working [Re: robbie_1961]
robbie_1961 Offline
Newbie

Registered: 03/08/2006
Posts: 12
Loc: Chelmsford, Essex. England
Thank you Graham, I managed to find it lurking where you said. Pretty rotten position, looks like an engine out job to undo it!!!

Thanks again, Rob.

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#1621300 - 03/06/2018 16:56 Re: Speedometer not working [Re: robbie_1961]
pompei Offline
Newbie

Registered: 20/08/2009
Posts: 9
Loc: Lincs
I have the same car and the same problem! Do the sensors give up and, if so, any ideas where I could get a replacement? Thanks.

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#1621329 - 04/06/2018 09:25 Re: Speedometer not working [Re: robbie_1961]
dante giacosa Offline
My life on the forum

Registered: 25/05/2012
Posts: 1912
Loc: Going North on the A9
you might be able to 'tap' the pulse in the wiring loom to check it is the sensor..

The pulse should be available as colours CB & (HM/)HR on pins 2 & 5 on Connector 149A (the big one, behind the battery)

in positions 2 & 5, on this connector, you should have Orange/White (CB) & (Grey/Brown/) becoming Grey/Red.
The colour change on pin 5, has Grey/Red on the 'engine' side of the wiring, and Grey/Brown on the dashboard side.

the negative reference for the speedo sensor should be an N (black) at position 14, on the same connector.

If you are clever; it might be possible to run some wiring from one of the first pair (pins 2 or 5), and the negative reference (pin 14), into the cabin, and feed a multimeter on AC volts, to see if you can see anything 'pulsing' during a slow roll across a carpark.

(I think i'd try this with the multimeter leaning against the windscreen from the outside, at SLOW speeds)

However, three factors may prevent a result-
*whether the speedo generates a decent pulse below 10mph
*the sample frequency of your multimeter
*and whether the relationship between the speedo and sender are compromised, and the speedo itself is dragging the pulse from the sender down.

But; I'd certainly try this first before attempting the sender swapout.



Edited by dante giacosa (04/06/2018 09:51)

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#1621454 - 06/06/2018 13:13 Re: Speedometer not working [Re: dante giacosa]
pompei Offline
Newbie

Registered: 20/08/2009
Posts: 9
Loc: Lincs
Thank you so much for the detailed advice

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#1621712 - 11/06/2018 09:25 Re: Speedometer not working [Re: dante giacosa]
robbie_1961 Offline
Newbie

Registered: 03/08/2006
Posts: 12
Loc: Chelmsford, Essex. England
Many thanks Dante for a detailed explanation. I might try with the front of the car up on axle stands rather than drive along.

It might save a few grazed knuckles and my swear box.

Kind regards,
Rob

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#1621714 - 11/06/2018 09:34 Re: Speedometer not working [Re: robbie_1961]
robbie_1961 Offline
Newbie

Registered: 03/08/2006
Posts: 12
Loc: Chelmsford, Essex. England
I have seen suitable sensors (I hope) on Ebay for about £25 e.g. https://www.ebay.co.uk/itm/FOR-FIAT-PANDA-PUNTO-UNO-BRAVA-BRAVO-BARCHETTA-COUPE-LANCIA-GEARBOX-SPEED-SENSOR/321276148349?hash=item4acd8cfa7d:g:m4EAAOxygPtSrjoK

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