OK. My gf has 2003 civic and hooking up system with the use of the factory cd player....i ran the remote wire off up a wire under the steering wheel to the left....labeled auto cruise....it was the first wire powered through ignition that i found, so i went with it. well everything was good till i unhooked the remote wire on amp and touched it again....while the car was on, and obviously somthing blew....the speedometer will not work, and the check engine light/battery light is on. the wire in the auto cruise block underneath steering wheel is not getttin power anymore like it was before when i used a tester on it....i looked in manual for somthing about cruise control fuse...but did not find anything....what am i overlooking here, and what is the solution please.

 

um.. im assuming that was the cruise control wire.. so look for a fuse to do with that or your speedo.

 

Just check all the fuses, in both the under dash fuse box and the under hood fuse box.
Sorry I do not have a wiring diagram for an 03, but on the 96-98 Civic it shows 2 fuses for cruise control, on for the main switch and one for the "Indicator Light Control" which is also the fuse for the speedo and tach "Drive Circuits".

BTW use the HUs acc. power lead, [yellow/red] for amp trigger. 94