I recently purchased a 2001 Ram 1500 4X4 that had Projector Headlights which were fully functional with low and high beams but the low beams were so focused that I couldn't see good, so I purchased aftermarket headlights that only have 1 bulb each (9400, low and high beam in 1 bulb). I replaced the projectors with the aftermarket headlights and I hooked the blue connector to the back of the headlights. Now I only have high beams and parking lights, blinkers. When I take the blue connectors off and put the black connectors on I have a constant high beam indicator and headlights stay on 1 setting (no matter which I choose low or high beam). If anyone know why this happens and how I can fix it I would be very appreciative of that info.

 

Sport model truck? You need headlamp housings with two bulbs. One for high, one for low.

 

Oh man, that kinda bites! With only brights, I bet that you can see much better now.
I cannot recall 100% if the projector lens in your truck had two bulbs or just one. Hopefully, you can exchange the ones that you bought for a two lamp headlight housing.