[Longhorn Man]

even with a universal, the plug wouldn't be the issue.
The problem will be somewhere between the fuse box and the tirn signal switch.
Since you have power to the brake light switch, and jumped it, this removes that switch from the system. Also, since you just replaced the turn signal switch, we'll assume that one of the two turn signal switches are good (probably both of them are)
I would trace the wire from the brake light switch, to the turn signal switch, looking for damage, and also, jump the brake light switch again, and check for power where the brake light wire goes into the turn signal switch. Odds are, your problem is in that wire.
This universal switch, did it involve cutting and crimping to install the factory style plugs? If so, check for power after everry butt connector in the series.