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| Source a clamp-on DC ammeter. UNPLUG the grill lights. Take some wire leads and wire in a big light bulb (like a 4411 headlight) into the FUSE SOCKET to limit the current on the circuit. Take the clamp-on meter and check the amperage at various, easily accessible locations along the harness. Note, you should be able to take measurements by simply clamping the meter around the whole harness. The point between where you have amperage and where you don't will be the location of the fault. Repair to your satisfaction.
Mav
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