I just had a similar problem, 2012 D4D. Drove it Friday with no problems. Replaced a cracked tail light assembly this morning with a $50 Ebay one, then went out in wife's car. Tonight went to drive the Hilux and found that my AC, blinkers, reverse lights, power windows, power heat and fan weren't working. Radio, wipers/washers, hazards, headlights, dash lights & remote central locking were OK. It seemed strange to me that the blinkers didn't work individually but the hazards and flash on lock/unlock were fine. I took the tail light back off, replaced the new wiring harness with the OEM one, then when the problem persisted went looking for a blown fuse.
Found that it was the 10A ECU/IG & Gauge fuse on the driver's side. Absolute pain in the arse to get my big clumbsy fingers in there to get it out, even with the supplied tool. Here's hoping that there was something wrong with the harness on the new tail light and I don't have to do that fuse again.