Ceiling Pendant?

Have a ceiling pendant (one of 2 that work together). Three switches can operate these (2 upstairs - one a dimmer & one down). Trying to replace light but without any joy - 2 cables (Cable 1 - blue, 1 red, 1 yellow / Cable 2 - 1 red & 1 black). 90% sure the blue was connnected to S/W & black to Neutral when I took off but can't figure out the other combination. Any ideas? Have had the lights on again but one on constantly, the other flashing (can't switch off). Dya think the dimmer switch has blown as things did trip at one point? Any thoughts/suggestions/ideas most welcome.