I have a 2005 honda odyssey was underneath it the other day and noticed a wire hanging down. it is a blue and a yellow with blue stripe with a connection on the end that is blue. It attaches to a grey clip when I unclip it, it is about a foot long I tried to chase the wires back but they go into a harness of wires. It is completely baffling me. It is attaches the bumper wall side. Anyone have any ideas?

 

Those are the harness wiring connectors related to the front engine mount control actuator.

The connector is black, with a Blu wire and a Yel/Grn wire. The gray connector is Connector C202, which is part of the harness bridging it.