I want to wire up my PIAA 510 fog lights using their wire bundle as supplied with the lights. But I want to use my factory installed fog light switch as the trigger, so which wire do I tap into & where?. Can in be done from under the hood?. I have the 2001 service manual but Iam not very good at reading the wiring diagrams. My truck is a 2001 ETH. Thanks, Gary.