Speed pulse sender for Sat nav

[PIERSY]

I have had a 'Becker On-line Pro.' Sat nav/phone unit fitted to my P reg Griff 500 but the fitter cannot find a suitable speed pulse source. He piggy backed the speedo feed but this caused the speedo to stop working. He is also aware that a speed pulse goes to the ECU but does not know how to identify it . Is there anybody here who can help or knows of someone that can (ie a re-chip/sparks TVR bod?)

Please help as I want to play with my new toy.

Ta!!

Piersy

[Ballistic Banana]

the actual speed sensor is on the top of the diff and is a bit of an Arse to get to unless you have a pit.
That then goes to the ecu i think but not sure what the wire colours are and its route??

This is on my 95 Griff.

BB

[Leadfoot]

See:

www.pistonheads.com/gassing/topic.asp?t=72466&f=8&h=0

HTH

[PIERSY]

Thanks for all the advice and links. If the fitter can't work it from here on he must be very

Ta

Piersy