2 things may be at play here:


1. Didn't hook up to the correct lead to turn on the factory amp.
2. Need to bypass the factory amp and connect directly to the speakers.

If it's #1, then you need to find the correct remote turn on lead. I looked up the diagram and it's #4 pin on the 8 pin plug (located at the top right of the left side if you're looking at the plug dead on). It's called or labeled "amp control signal". Be aware that there is another pin output called the exact same thing in the 12 pin plug too. This is why this may be a difficult situation. BTW, on the 12 pin plug it's the #8 pin.

If it's #2, you can connect the output of your HU to the output wires coming out of the amp and then you won't have to run new cable.


Another easier way.......bring it to our shop and let our audio guy do this for you......