I agree with you. A harness is much easier, keeps the pesky dealership from voiding any warranties, is much cleaner, etc,etc. At the same time, It depends on what is being done. If you are replacing more than just the head unit, like upgrading the junk factory speakers, then knowing which is + or - in the door is a good thing. Also, if the factory system is being completely pulled to make way for a full custom system, then only 3 wires at the dash are needed. The rest will be ran by the installer. Hard to justify the $15-$30 to purchase a harness just for 3 wires when they can be tapped into in less than 2 minutes without cutting. So it just depends. |