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Author Topic: Speedometer not working  (Read 7346 times)

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I_want_an_Omega

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Re: Speedometer not working
« Reply #45 on: 28 January 2014, 08:20:22 »

My guess is that bulbs have been removed - that's by far the easiest thing to do and is often done  by Mssrs Bogit & Scarper. I was the victim of a clever bodge when I bought my 2.5 estate. The EML bulb was disconnected from the ECU and reconnected to the ignition light feed. This was to mask the fact there was a sensor fault bringing the EML on. Fooled me for months and only highlighted by DTM plugging a Tech2 in.

Another option would be to cut wiring further down the loom - although less likely as it would require the perp to be able to identify the correct wires and then cut.

Although my spare clusters are all MFL, I can't see GM changing the bulbs between MFL & FL ..

I'll send you a complete set of instrument panel bulbs, PM me your address & I'll get stuck in .....

Be warned though, I suspect that when replaced the bulbs will then be ON - allowing you to home in on the ABS unit as the most likely culprit ........
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Kate

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Re: Speedometer not working
« Reply #46 on: 28 January 2014, 09:28:34 »

My guess is that bulbs have been removed - that's by far the easiest thing to do and is often done  by Mssrs Bogit & Scarper. I was the victim of a clever bodge when I bought my 2.5 estate. The EML bulb was disconnected from the ECU and reconnected to the ignition light feed. This was to mask the fact there was a sensor fault bringing the EML on. Fooled me for months and only highlighted by DTM plugging a Tech2 in.

Another option would be to cut wiring further down the loom - although less likely as it would require the perp to be able to identify the correct wires and then cut.

Although my spare clusters are all MFL, I can't see GM changing the bulbs between MFL & FL ..

I'll send you a complete set of instrument panel bulbs, PM me your address & I'll get stuck in .....

Be warned though, I suspect that when replaced the bulbs will then be ON - allowing you to home in on the ABS unit as the most likely culprit ........

Thanks so much Rob. :y

I can't believe the lengths these scammers will go to to sell cars. :o

I really like the mig that I bought though. Black migs with black leather look excellent IMO. I know it needs work but it's exactly the car that I wanted.

I'll PM my address.

Thanks again for helping. :y
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ffcgary1

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Re: Speedometer not working
« Reply #47 on: 28 January 2014, 19:14:17 »

Kate every so often my speedo stops working as well, i just give the dash above the speedo a thump with  my hand and it starts working again, ::) so i took the clocks out and cleaned the contacts with contact cleaner and all seems to be good again. check that first and whilst out check all the bulbs.
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Kate

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Re: Speedometer not working
« Reply #48 on: 28 January 2014, 21:04:44 »

Kate every so often my speedo stops working as well, i just give the dash above the speedo a thump with  my hand and it starts working again, ::) so i took the clocks out and cleaned the contacts with contact cleaner and all seems to be good again. check that first and whilst out check all the bulbs.

Well I hope mine isn't a more complicated problem like the abs ecu. I need a wheel bearing doing and the cambelt so an easy fix on this would be very welcome.

Thanks for the advice! :y
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Kate

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Re: Speedometer not working
« Reply #49 on: 29 January 2014, 16:44:56 »

Well I decided to have a go at removing the cluster today to check the bulbs but it didn't quite go according to plan.

I managed to remove it but I snapped the piece of plastic under the clocks then the screw fell under the driving column plastic.  I tried to retrieve it to no avail. Would it be alright to leave?

It turns out that a lot of you were right and the bulbs had been removed. I replaced them and finally put everything back. Well sort of. ;D

Thanks to Lincs Robert for sending me a set of bulbs. :y

The abs and tc light now stay on all the time when driving.

Is it normal for the pixels to go a bit funny on the info screen after this job?
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I_want_an_Omega

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Re: Speedometer not working
« Reply #50 on: 29 January 2014, 16:56:41 »

Were the pixels ok before Kate?

If so then maybe a connector hasn't been properly seated or is a poor connection which needs to be plugged/unplugged a couple of times to make it work?

I've got a number of spare displays here - but are from MFL cars with CCR800 radios, also the smaller displays from CCRT700 - will need an expert opinion as to whether they will work or not. You are welcome to one if the view is that it will help .....

You can remove the shrouding around the column which should allow you to get to the screw - it probably wont do any harm - but may end up somewhere untoward - so best to remove if you can.

TTFN & glad to be of service  :y
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Kate

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Re: Speedometer not working
« Reply #51 on: 29 January 2014, 18:54:55 »

Thanks Rob I'll have another look at it tomorrow. :y

With regards to the speedo not working - is there a guide on how to check the ABS sensors on each wheel?

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JamesV6CDX

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Re: Speedometer not working
« Reply #52 on: 29 January 2014, 18:57:13 »

Thanks Rob I'll have another look at it tomorrow. :y

With regards to the speedo not working - is there a guide on how to check the ABS sensors on each wheel?

It's not working cos the abs ecu is shot
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Kate

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Re: Speedometer not working
« Reply #53 on: 29 January 2014, 19:17:40 »

Thanks Rob I'll have another look at it tomorrow. :y

With regards to the speedo not working - is there a guide on how to check the ABS sensors on each wheel?

It's not working cos the abs ecu is shot

Thanks James. :y

In the guide it says to check the sensors. Do I not need to do that then?
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JamesV6CDX

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Re: Speedometer not working
« Reply #54 on: 29 January 2014, 19:20:33 »

Thanks Rob I'll have another look at it tomorrow. :y

With regards to the speedo not working - is there a guide on how to check the ABS sensors on each wheel?

It's not working cos the abs ecu is shot

Thanks James. :y

In the guide it says to check the sensors. Do I not need to do that then?

Nothing to be lost but its unlikely to help
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05omegav6

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Re: Speedometer not working
« Reply #55 on: 29 January 2014, 19:37:07 »

The ABS produces a speed signal based on the average speed of all four wheels. One or even three duff sensors won't stop the speedo from working. A dodgy sensor would put the light on.

If you're really lucky you might find the sensors unplugged or covered in muck, but realistically, light on and no speedo = dead ABS ecu :'(
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Kate

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Re: Speedometer not working
« Reply #56 on: 29 January 2014, 19:39:00 »

Is it possible to buy an ABS ECU or is it best to repair the one that's on the car?
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05omegav6

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Re: Speedometer not working
« Reply #57 on: 29 January 2014, 19:43:14 »

Is it possible to buy an ABS ECU or is it best to repair the one that's on the car?
Either/or or both :y

Might as well get yours repaired, and if you find a working one in the meantime then great...
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Entwood

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Re: Speedometer not working
« Reply #58 on: 29 January 2014, 20:44:05 »

Is it possible to buy an ABS ECU or is it best to repair the one that's on the car?

The one you buy second hand might just be about to fail, as this is a fairly common fault. £130 for a repaired one with a two year warranty is, IMHO, the most economic solution.
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Kate

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Re: Speedometer not working
« Reply #59 on: 29 January 2014, 20:49:00 »

Is it possible to buy an ABS ECU or is it best to repair the one that's on the car?

The one you buy second hand might just be about to fail, as this is a fairly common fault. £130 for a repaired one with a two year warranty is, IMHO, the most economic solution.

I wouldn't be able to remove the old one so that's a big problem.

Can the car run without one installed btw while the part is being repaired?
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