Ok I figured I would finally try to put this question to rest..
HOW TO BYPASS THE FACTORY AMPLIFIER!!!!
What you will need:
1) Wire cutters (scissors are just for emphasis here)
2) Some way to connect wires. Crimp connectors, Solder/tape, twist connectors, whatever tickles you fancy.
3) 10ft of speaker wire
4) Wiring harness adapters are OPTIONAL. If you want to just cut and splice everything you can do so.. But it makes it a pain in the arse when you want to reverse the process.
Wiring harnesses needed:
Metra 70-1770
& Metra 70-5513
OR
Metra 70-5514
Yes you can see the difference between the 1770 and the 5514, the black speaker plug is square on the 5514, and flat on the 1770...It doesnt matter!! you won't be using the speaker plug anyways!!
First of all, take your power plug:
Wire it up to your new Headunits wire harness (Alpine pictured):
and plug into your factory harness that was connected to your factory radio:
Now moving onto the factory amplifier....
Steps:
1) locate factory amplfier, to do so pull on the two tabs inside your glove box:
2) The glove box will then swing down revealing the factory amplifer:
3) Pull the speaker output plug out of the factory amplifier (there is a tab in the middle of the plug that needs to be pushed in):
4) take your bypass harness:
And plug the one end that fits into the harness that you just pulled from the amplifier.. Now, cut the bypass harness in half and throw the other half of the bypass harness away:
5) Take your aftermarket headunits wire harness:
And add about 2.5 feet of speaker wire onto each of the 4 pairs of speaker wire..
Run this wire through behind the radio and down to your cut bypass harness and attach to the bypass harness... You simply have to match the colors of wires, You may want to label your speakers wires before you run them behind the radio so you can tell what they are.
CONGRADULATIONS!!!! YOU HAVE NOW BYPASSED YOUR FACTORY AMPLIFIER!!!
