WesBrooks Posted March 29, 2016 Share Posted March 29, 2016 Hi, I've got a cruise control unit from a donor '95 Discovery V8i that I plan to reuse on my project. Most of the inputs and outputs are obvious from the haynes manual but not sure about the speed signal as it comes from the instrument pack in the dash. Is this just the speed signal from the sensor relayed through the dash or is there more to it? The original dash is not being reused. If I could simply split the signal from the sensor to a speedo and the cruise control that's be great! I'm planning to bench test the system using an Arduino to fake the appropriate signals. Thanks. Quote Link to comment Share on other sites More sharing options...
WesBrooks Posted March 29, 2016 Author Share Posted March 29, 2016 Great description of the system on the following link but it stops short of saying what the peak pulse voltage is. http://www.landroverworld.org/forums/archive/index.php/t-3629.html Often in electronics the signal voltages are dropped to 3.3 or 5V. If no one knows for sure I will try 3.3 and 5V before chucking the full 12V signal at it! Quote Link to comment Share on other sites More sharing options...
WesBrooks Posted March 29, 2016 Author Share Posted March 29, 2016 I've got the 'unreliable' one from this thread. Perhaps I should base my system on the newer one. That said it looks like it accepts the same signal. http://landroverforums.com/forum/discovery-i-39/retrofit-d2-p38-cruise-control-ecu-57040/ Quote Link to comment Share on other sites More sharing options...
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