Dang yeah actually i haven't tried calling Kicker. So I measured the voltage and the main power wire is 12.4 v the main ground is 20mV. Then the small purple wire is .1mV, small white wire is 305mV and the small black wire is 341mV. Not sure what they should be but Definitley confirmed main power and ground to the amp
Ok with that you definitely see that you are not getting a trigger signal to turn the amp on. I'm just guessing but I think the purple wire is your trigger which should be a +12Vdc signal. The small black and white wire I'm assuming is the positive (white) and negative (small black) for the actual stereo signal. The 305mV might be a good sign as to it is actually getting music through it depending on how high the signal lvl is supposed to cap out at. I'd guess 4Vs max but don't quote me on that.
So this is what I would do.
1) Measure voltage at the FAT Red wire with everything OFF. If it is zero we can get ghetto with it later.
2) Re-install all of your Sync 2 stuff. Yeah that sucks but you need data.
3) Turn the stereo on. You can have something playing but it doesn't matter.
4) Measure the skinny wires and find the +12V. That's the Amp turn on trigger. I'm guessing purple.
5) Get a signal generator app on your phone (test tone app) and play a 40 to 60HZ sine wave at about lvl 10 volume should work.
6) Measure the skinny wires that aren't the trigger. I'm guessing the White is the positive signal and you only will need to pay attention to one of them. Write this number down.
7) Re-install your Sync 3 stuff.
8) Repeat steps 5 and 6 and compare the voltage. If you get about the same Voltage as you did with the Sync 2 stuff you can assume you have a stereo signal going to the amp. This is good.
9) If in step 1) you have NO +12V reading with the power off you can tap a wire from there to the wire that is supposed to be the trigger wire (again i think its purple). If there is power there you are going to have to figure out a different source to tap for a +12V signal to turn the amp on.
The big key with this is IF you are actually getting a stereo signal to the amp. I really don't know what the amp is supposed to be getting if its high lvl or low lvl inputs. I'm guessing low so a range of 0-4Vs.
