Hi folks
just bought a westie with vdo electronic speed. got new sender but nothing appearing on dash. followed the calibration instructions but can't get anything on the display other than a set of dashes???? Needle whips across ever
y 10 ish seconds. any ideas anyone.

Some sensors have an LED in the end to help diagnostics. When you spin the wheel then it should flash. It is basically a Hall effect sensor with a digital (puled output) Put a DVM or better an analog meter on dc and you should get a reading change when you spin the wheel (on the sensor output terminal).

The fact the speedo is indicating fsd every ten seconds or so is significant. In my mind it is indicating the supply volts are either marginal or intermittent or very noisy. Either way try an external supply from another battery.

Just some thoughts!

No led, tried meter earlier today indicating pulses as each of the six drive shaft bolts passes by. will try checking vol supply to unit next. when i try to calibrate unit still only get dashes across display. cheers for advice. still at drinking t and sitting down stage of diagnosis........pulling hair will follow later :-D

On mine I had to power the sensor up from the 12volts into the sensor..........


I am not 100% what I did without looking but it now works do if u need me 2 I can have a look and tell u what I did

I've fitted one to a bespoke mk2 escort. It will work with a variety of speed sensors from hall effect to reed switches etc. ( From memory). I have all my notes at work so will have a look tomorrow for you.
Meanwhile this might help you with your setup/calibration.
http://www.springfieldstreetrod.com/Install-InstructionsSpeedo.htm


[Edited on 13/10/13 by omega 24 v6]

Apparently it should say "test" on the display,when powered up......it doesn't . Just effin dashes. thanks omega, all help appreciated everyone

Looked at all my notes and there's nothing extra on them other than what you see on the website I posted above.
Was it working before?? And what type sensor do you have??.
ETA have you tried the holding in of the button whilst you turn on the ign switch. Might be enough for it to go into calibrate mode and restart the process.

[Edited on 14/10/13 by omega 24 v6]

ETA where have you read/been told it should read " Test" I can find no reference to it at all in any documentation I have or online?

[Edited on 14/10/13 by omega 24 v6]

Been pulling my hair out for two hours cos i havnt been able to reply. anyway im back. "test" bit is on egauges pdf.

Its a new inductive sensor. Pushing button while turning ign on does nothing .

You got a link to the egauges pdf?

http://www.gomog.com/allmorgan/VDOCALIBRATION.html
checkout the very bottom of this page. Willy and find link to egauges in a mo.

http://www.gomog.com/allmorgan/VDOCALIBRATION.html
checkout the very bottom of this page. Willy and find link to egauges in a mo.

http://www.egauges.com/pdf/vdo/0-511-011-348.pdf think thats it , but im a computer numpty so who knows.