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Right well i found a plug on the back of the speedo.. It has a brown wire (earth) and a black and yellow wire.. Im going to drive home in a bit with my meter attached to see what it produces.. Anyone know what I should expect in terms of voltage, i read somewhere that it produces between 5-12V?
This must be some sort of pulse as none of my other W123's have this and disconnecting it makes no difference to any guages or lighting.
p.s. i dont have cruise.
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