Somebody has asked me to make a zombie map for them that uses some kind of a switch. I have done so, (All but one spawn as zombies, human spawns in the garage. Zombies can get in the front door, but he cannot get out the front. He must use the side door blocked by a teleporter. Ergo, he must escape with a vehicle. In this case a Warthog, and splatter the army of zombies until they finally kill him.) My problem is that the warthog in the map does not spawn in an infection gametype. It spawns in everything else, but not infection. Why?
Go into the gametype and select weapons and vehicles. Then go to vehicle set and put it to 'all vehicles'
Make sure that the warthog is set to spawn in asymetric gametypes. To do this, go into forge and press x on the warthog. Make sure that it says "Both" and not "Symmetric".
Did you mess with the Symmetry option? If you have it set to Symmetric (I think) instead of Both or Asymmetric, it wouldn't spawn in infection (or one flag, single VIP, etc). Other than that, I have no idea. Edit: Dammit, Kuroda.
It may be past those simple problems guys, When time glitch was working on Agents, he came across a problem that got rid of sentinel beams no matter what, I also came across this problem when making a zombie mini-game. It is an odd glitch. Try remaking your gametype from an original bungie-made zombie varient.