Item 1001212486 has must read information.
: In order for this light kit to work, your machine must be equipped with cab electrical option 1 harness. If your machine is not already equipped with cab electrical option 1 harness, please order "Cab Electrical Option 1 Harness Kit" and install that before installing this light kit. Please refer to your machine's parts manual for the proper part numbers. 

KIT,ROAD LIGHTS,1043/642

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1001212486

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EA
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KIT,ROAD LIGHTS,1043/642 - 1001212486