my installer doesn't know how to do it right? they call him "master installer" for the shop who couldn't read the instructions in the manual... even my friend who installed 2 other empegs could do it... but he wasn't available at the time of the install... my friend says there is only 4 wires to deal with!!!!!!! i say WTF?

things not completed:

ground loops -- alternator whine.
remote amp wire -- master installer couldn't detect a volt on the blue wire!
tuner - not even connected.

question is:

can the remote amp wire kickstart 3 compoents? (2 amps, 1 audiocontrol)
do i need a relay? what kind if i do?

any other suggestions, please let me know. i'm paying them a visit tomorrow.