I have just installed an Alpine ex10 ipod control unit. It works great but is powrered by the cigarette lighter. I hate the look of this., If i re routed the cigarette lighter power cable and socket behind the dash, would this be safe??
i haven't seen the cigarette lighter plug on the ex10, but some devices have circuitry/fuses inbuilt into this plug; basically means, don't cut it off without checking.
if you need to keep the plug (which might be worth doing regardless, in case you sell the thing in the future (at least keep the plug if you chop it off)), then its best to install a new female cigarette lighter plug behind the dash. that is, buy a new plug, connect the wires up correctly to the existing cigarette lighter wiring, and plug the ex10 into the new plug.
for peace of mind, you may wish to add an extra inline fuse along the new +12V powerwire, near where it joins to the alfa cigarette lighter wiring.