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Discussion Starter #1
I've changed the sensor, the relay and still the DRL's come on for about 20 seconds then they shut off. I can hear a click under the dash behind the glove box every time when it shuts off. Occasionally they will come on and stay on when I start it, but more often then not they either don't come on or will shut off after 20 seconds.
 

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The truck may think it is dark.

You have a day time, night time light sensor on the dash, it may not be sensing that the sun is shining.
 

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Discussion Starter #3
I was hoping the new sensor would change the way its reacting but it isn't. Its sitting in direct sunlight.
 
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