AP2 Harness Wire:
On AP2 harnesses, there is a "loose" wire with a spade connector. The purpose of this wire is to supply constant battery power to the cluster in order to save your settings and keep time on the clock. It should be connected to the B+ Option terminal of your fuse box. All of the common vehicles are relatively the same. Here is an example:
Cluster Lens Install:
Ultra Bezel Assemly:
More Instructions:
02-04 RSX Cluster Harness Instructions