Who knows? You need to test the circuit with a test light or digital multimeter. It could be as simple as a blown fuse, or it could be a defective car stereo.
the ACC wire from the stereo is connected to constant power (+12V)
NO
red
Yes it can.
http://www.modifiedlife.com/car-radio-wiring-diagram-and-car-stereo-wire-diagram-2001-saturn-sc1/ orange and yellow wires are power
You'll need a pretty substantial amplifier to fully power the Boss Diablo D693.However any car stereo will power it at lower volume levels.
Yes, the cassette is inserted into your car stereo which uses power from the battery.
The power used by Pioneer brand car stereos is variable depending on the specific model of stereo. For example, Pioneer stereos use as little as 5 amps and as much as 12.
The THD Hot Plate is a power attenuator for a car stereo system. You can use the THD Hot Plate to keep a power source to your amps. The Hot Plate is used by serious car stereo enthusiasts.
Some headunits share a power antenna & remote wire are the same wire. If it is hooked up to power antenna and not hooked up to factory amp there is no signal to tell amp to power up
not 100% certain but i dont know of any stereo's that you cant add a subwoofer too you will however need a power amp to drive the sub.
the black wire or yellow wire are not connected right