Get the sun key!
No there is not a third crest in phantom hourglass.
you have to draw an hourglass in a single stroke
take the second passage way and use the sun key to open the door
make an hourglass or triforce.
There's no Sun Temple in Phantom Hourglass. There is a Sun Key which will be used for multiple things, but there is nothing in it that I know of (and I've beat the game) that is called the Sun Temple.Sorry.
the hourglass itself
draw an hourglass from left to right cross down left, to the right, and cross up right
I think it was somewhere near a cave you probably know where it is the place where there is a door with a sun symbol on it where the arrow shooting game is
which crest if you mean the triforce or hourglass, you have to draw it on the door, if you mean the sacred crest, it is past the first red door, the one you draw the hourglass
U touch it
its a trifource
What part of the game, hun?