I have a 2001 Jeep Grand Cheroked Laredo that has the same issue. Fuse #20 is labeled "Ignition run" but it apparently also powers turn signals and the ac. I replace the 20 amp fuse and the turn signals and ac will work again. However, the fuse keeps blowing periodically. I'm going to try a new turn signal switch and see if that may fix the issue. I assume you fixed your jeep. What was the issue?
COULD BE BLOW FUSE.FAULTY TURN SIGNAL SWITCH OR FAULTY TURN SIGNAL FLASHERS WHICH IS LOCATED FUSE / RELAY BOX JUST LEFT OF THE STEERING COLUMN.
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