Re: Only Highs...no lows.
you should be able to zoom in w/ your browser or save the image and zoom.
ok, 2 relays for headlights...one for high, one for low. You said realy in your responce. Are you sure you had the correct low beam relay?
The body control module sends the signal to the relay. Do you have any other odd issues inside the truck? These are not physical switches anymore, its data through a computer network.
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