Hard wire sat nav help required.

[raziel]

I need a little help here , I'm fitting a VDO Dayton sat nav, the instructions say that I need to connect one of the wires to the digital signal which goes to the speedo so the unit knows how fast the car is going and I haven't a clue how to do it! Anybody done this? Anybody know where to connect to?

 

[MT AUDIO]

speed pulse is on the iso plug,i cant remember which pin off top of my head,do a seach for speed pulse

 

[Michael]

At the iso power connection the speed pulse is pin no. 1(grey wire)