BBQ Grilled Corn: Directly on the Grill. This is what I do the majority of the time. I love the caramelized kernels (both the look and the taste) and the smokey flavor it picks up from the grill. You do however need to be careful because you can burn and dry out easily.
http://ourbestbites.com/2009/07/tutorial-grilling-corn-on-the-bbq/
3. Securely seal the foil on both ends and the top. You will rotate the corn so you want to make sure it’s sealed up tight so the butter doesn’t leak out. 4. Place on preheated grill and rotate every 5-10 minutes for about 15-20 minutes. Be careful when opening.
http://ourbestbites.com/2009/07/tutorial-grilling-corn-on-the-bbq/
Preheat your grill to a medium-high heat, about 350–400 °F (177–204 °C). For a coal grill, arrange coals in an even layer and heat until grey. The best way to heat a gas grill is to fire it up on high, then lower it to the desired temperature. This ensures a hot rack.
http://www.wikihow.com/Grill-Corn-on-the-Cob
Place the corn on a lightly oiled grill rack, either just above the coals for a shorter cooking time, or high above the coals to lower the risk of charring. Close the grill and cook for about 15–20 minutes, turning every 5 minutes or so. Check the corn ready when the husks start to get kernel-shaped char marks and pull away from the tip. If the kernels don't feel tender when poked with a fork, it's fine to leave the corn on until the husk chars black.
http://www.wikihow.com/Grill-Corn-on-the-Cob
1 Place corn cob in center of a sheet of aluminum foil. 2  Add butter, soy sauce, and parsley. 3  Thoroughly close the foil, making sure cob is completely enclosed. 4  At cooking time, place on grill on medium heat.  Cook for 10 - 15 minutes.
http://www.food.com/recipe/grilled-foil-wrapped-sweet-corn-on-the-cob-270754
1 Be careful not to overcook your corn or it will become soft and mushy. If you can flex the corncob easily in your hands, it is probably overcooked.  You can cook corn directly on the coals instead. In this case, the corn will be ready when the husk is completely charred.
http://www.wikihow.com/Grill-Corn-on-the-Cob
Grill the corn. Place each aluminum-wrapped ear of corn on the preheated grill/ Cover and allow to cook for approximately 15-20 minutes. Turn occasionally, using a kitchen tongs, to prevent the corn from charring on one side.
http://www.wikihow.com/Grill-Corn-on-the-Cob
1 Place corn cob in center of a sheet of aluminum foil. 2  Add butter, soy sauce, and parsley. 3  Thoroughly close the foil, making sure cob is completely enclosed. 4  At cooking time, place on grill on medium heat. 5  Cook for 10 - 15 minutes.  Flip over and cook for another 10 - 15 minutes.
http://www.food.com/recipe/grilled-foil-wrapped-sweet-corn-on-the-cob-270754
BBQ Grilled Corn: In the Husk. This is the method I use least often. It’s kind of a pain to do the whole silk-removal and re-husking thing, but the bonus is that the husks keep in moisture so you get a pretty juicy cob, and since it’s right on the grill you sill get some of that smokey flavor as well.
http://ourbestbites.com/2009/07/tutorial-grilling-corn-on-the-bbq/
1. Lay the clean corn cob on a piece of heavy duty foil. If you don’t have heavy duty, make sure to layer a few sheets of normal foil together or you run the risk of burning the corn. 2. Rub butter {real butter! always!} all over the surface of the corn cob.
http://ourbestbites.com/2009/07/tutorial-grilling-corn-on-the-bbq/
how long does it take corn to cook on the grill
Cook a corn on the grill between 15 and 20 minutes by turning it every 5 minutes or so. It takes 15 to 20 minutes for corn to cook on the grill, turning every 5 minutes or so.