They are probably dim because the plastic lens has faded. You can clean them with a product called CrystaLenz. I use this product when I detail headlights at used car dealerships, and it works extremely well. Check out their website www.CrystaLenz.com for more information.
Poor ground or weak alternator/battery. Have your electrical system checked. If your headlights are like the Headlights on most Voyager/Caravans the lens is dirty. I detail headlights at used car dealerships in the Jackson Tn. area and I use a product called CrystaLenz to restore the lenses. Most cars with plastic headlight lenses and especially Chrysler/Jeep products have that problem. Check out their website for more info. www.crystalenz.com.
I doubt if you need to remove your headlights. Mine were extremely dim and I considered replacing them, but instead I bought two bottles of cleaner and polisher. Can't remember the name, but any O'Reilly's has it. You apply with an orbital sander (use a rag over the top NOT the sandpaper) and it does a fantastic job of returning your lights to brights. Costs about $12.
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