flhtcui1340
Member
2011 Expedition EL Limited. I'm installing an rp4-fd11, aftermarket stereo and aftermarket amps. Im going to use the four door factory wires. If the rp4-fd11 is connected, will the rca cables from the deck cancel out the factory amps or do I need to disconnect the factory amps? If so, where is the main amp? I've located the sub amp.
