Well we just put a new radiator in my 00 Cherokee limited and when I drove it and used my right turn signal it blinks about 2x the speed normally... The left one blinks fine..... All 3 lights are working for the blinker.... Any thoughts?

 

bad ground for the turn signal, or bad bulb / socket.

 

Where are the grounds at? It can't be the bulb or socket because all the lights work.

 

I had a corroded socket in one of the two-bulb front turn units. Both lamps worked fine for marker lights, but only one blinked as a turn signal. Had to disassemble the socket to see the corroded open circuit.

I've read here many of these grounds are under the driver's side interior rear panel behind the spare tire. If you have trailer hitch wiring installed, you'll have more places to look.

 

When light blinks double speed its because ones not blinking .