andywalnut

Thank you all so much. I'm pretty sure I understand now. Having done the wiring with parts from VWP among others, I should be able to implement the final solution:-) I'll let you know how I get on. Best wishes, Andy

Thanks Discomikey. I maybe overthinking things a bit! I guess the CC could just be kicked in with the Roverdrive then it would only need to be calibrated for that usage. Do you know how a Speedo-Healer would need to be wired into the CC? Regards, Andy

Thank you Anderzander. In the thread you pointed me to, Yourself and V8 Freak have detailed and clarified a great deal. Something like the Speedo-Healer may well be what's needed. However the overdrive unit can be engaged or not, unlike a transfer box which is always "in". I would need a solution to switch in or out, depending on whether the overdrive was engaged. (What's another switch or two! Ha, ha!). I'm not clear on where the Speedo-Healer is wired in? Andy

I've a 2003MY TD5 90 which I'm loving and to which I'm adding upgrades as funds and confidence allow. Over the past couple of days I've wired in cruise control using knowledge I've gleaned on this excellent forum. It's wired into pins 10, 11 15 and 17 of the ECU and it works a treat. Thank you very much to anyone who's posted on cruise control. There is one problem which just defeats me, however. My 90 has a "Roverdrive" overdrive unit, fitted by the previous owner. It has given no problems in itself but when it's engaged the CC will only work in 4th gear. It will not set in 3rd or 5th gears. (Haven't tried 1st or 2nd, obv!) In non-overdrive mode the CC works perfectly in 3rd, 4th and 5th gears. If anyone can shed any light I'd be really grateful. Many thanks, Andy