Speedo not working

[hodgkinsons 0]

In an effort to fix the spoiler not working on the auto sensor I tried as mrbeige did (successfully) to replace the transistor on the back of the clocks. Once replaced my speedo no longer works neither does MPG, ave speed or any other speed related MFA readings. Mrbeige has kindly looked at the clocks and tested on an autosim, he reports that the clocks are fine and all works ok when tested on this. I now have the clocks back and re fitted them but I still get the same result. Has anyone had this happen to them or know how to fix? The speedo worked fine before, is it possible that the speed sensor on the gearbox has gone?

 

thanks

[just_say_meth 0]

had the speedo sensor on my gear box go recently but never got any of those symtoms, when mine went i still had a fully functional mfa.

[hodgkinsons 0]

So did yours just stop the speedo from working then and nothing else? Though it made sense that speed related MFA functions would also stop with no input from the pulse signal. i've got oil temp and airtemp still on the MFA.

 

Is the speed sensor easy to replace?

[just_say_meth 0]

speed sensor is easy to replace yeah, try a search there should be a part no. on one of my previous posts. but yea the speedo was the only thing that stopped working everything else was fine!

 

http://the-corrado.net/.archive/forum/viewtopic.php?t=47383

[hodgkinsons 0]

I've had a new speed sensor fitted now but it's not helped the speedo at all, the guy who's helping me diagnose it reckons I should remove the sensor and check with my finger to see if the gears are turning through the hole? any one heard of this before? I can't imagine why the drive to the sensor would stop?

[mrbeige 0]

just_say_meth, I see that you have a G60 and hodgkinsons, has a VR so the MFA functionality I think might work slightly differently on both.

 

Does the G60 clocks take a vaccuum feed straight into the back of them? I know that the VR clocks don't but my clocks (2.0l 16v) do :?