lights oscillate bright and dim whats going on

ok ill have to try the blue wire coming out..not running amp meter and wired to both wires at the gauge.with new links and wire..from batt...switch and connector at end of switch are new..harness was stripped and splice[junction] bared and checked for loose and broken wires deemed good..no smog choke solenoid or ammeter conn.no ammeter new links [2] i like the idea blue wire somewhere is causing it..i remember the blue and a few others wernt as clean as they coulda been when we put it in..ill ohm that connection tomorrow and see what it looks like.ill make a connection up and compare it to each other..my tomorrows job..tx..j