Polo Speedo Cluster Green Pin Layout for DIY Cruise-Control

[GJHuman]

Hi All

I am installing cruise-control on my car. But not the OEM plug in type. I have one with a servo that I will connect to the fuel pedal. See pic1 (not the same brand, the pic is only for reference). The OEM route would have been easier but I got this kit for free and is new about R4'500, and I am halfway done.

I already connected the:
1) Power
2) Ground
3) Brake status signal at pedal
4) Clutch status signal at pedal

What I need still to do:
5) Connect speed signal behind cluster.
6) Install servo near fuel pedal.

I looked all over the web and cant find a wiring diagram to fit the pin layout of the Green plug behind my cluster. See pic2 and pic3 for the layout of my plug. I looked on workshop manuals .com (pic 4) and I can find the cluster diagram for installation etc. but not the pin layout. On other forums I found the pin layout for the Golf 4 and 5, the Citi Golf, even the polo 5 but none of them match my polo's plug.

Can anyone help me with the speedo cluster green pin layout for my 2006 1.9 tdi polo?









Gerrit

[Deranged_9n3]

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[panic-mechanic]

There are three wires on your speedo pickup on the gearbox. Using a multimeter see if you can trace any of them to the cluster plug. if you find it then that is the speed signal.

[GJHuman]

Just an update;

Last night I jacked the right front wheel in the air and put is on a stand and put bricks in front of the other 3 wheels. I started the car and put it in second and released the clutch slowly. The wheel turned and the car didn't run off the stand

I connected the one end of my multimeter to ground and with the other I tried to find a wire with frequency on so I know it was the speed signal. There were a few wires with variable frequency on and I didn't want to rev the engine I was afraid the car would jump of the stand and run through the wall! So I didn't get what I was looking for.

In the process something started peeping a lot because I triggered the airbag on one of the pins. Luckily it didn't deploy , I assume it's because I didn't have my seatbelt plugged in.

This a dodgy exercise and I don't think I will try it again...

Any other ideas?

[panic-mechanic]

What you did was not what i recommended so that is still the idea i recommend.

[GJHuman]

Yes I know it's not what you recommended. I phoned a shop who install the same type of cruise control and asked them how they find the signal and that is how they do it. But they lift both wheels...

[GJHuman]

Success!

Last night I soldered the speed sense wire from the cruise control to pin number 5 on the 32pin plug on the back of the instrument cluster, as seen in the first image. It was a white wire with a purple stripe.

(Thanks to Bestech and their friendly service who gave me the correct pin number and colour within minutes! The cruise control is quite expensive but it's a really good product. This is the 4th car its been in since 2003, when 1st installed)

I couldn't really test it until everything was done and I could go for a test drive. So I quickly installed the servo as seen in the second image. Over the weekend I will install the servo properly.