Does anyone know where I can get a wiring turn signal diagram for the 2000 Grand Cherokee, Thanks

 

The back pages of the Haynes Repair Manual has a diagram but you'll need an engineer to understand all the codes and where to look for the connectors.

 

Specifically I am looking to find out what the colors of the wires that go from the dash to the left rear turn signal so I can trace them for breaks or problems.

 

Good F***ing Luck! I checked my wiring diagram starting with the lamp socket. It's 18 ga. tan. From there it changes to light blue at the first connector. From there, I got lost. At the next connector, the pins are so complicated they're not numbered on my diagram. Also, the diagrams are in 3 sections which make it even more difficult. When I have more time, I'll get into it. The problem is, this diagram is listed as "typical", so some of this wiring may be used on other vehicles.

One way you could trace it would be to "back-power" the wiring with a signal generator and probe each connector on the way back. This is an "out-of-the-box" method, but I've seen it done on large equipment.