I'm glad you found the problem.
However, I think your plan is flawed. By jumping the DRL as you did, you were "back feeding" voltage to circuits (such as your dash lights) via a path that may not have the capacity nor the proper fusing to protect from an electrical overload - Which might cause a fire!
I have never been a fan of running the DRLs at night, as they were not designed for that purpose, and may blind oncoming traffic needlessly.
Now, having said all that...
It sounds like you used a plain wire to jump the DRL relay. The DRL MOD that has been posted here specifies a diode be used. Think of it as a one way valve for electricity. I believe the diode would prevent voltage from flowing from the DRL circuit back to the tail light circuit during the day when the DRL circuit is powered normally.
This has actually already been discussed in the thread below:
http://elcova.com/groupee/forums?a=tpc&s=2826088551&f=6706011751&m=687600449 1&r=8006042891#8006042891