I'm attempting to recharge my A/C in a 2003 Explorer Sport. Here's my situation:

Air is blowing, but not cold. Went and purchased a charging & measuring kit with 3 cans of R-134a.

Need to exactly locate the low pressure port. I'm pretty sure that I have already but want to be positive before I screw something up. Can someone offer advice on doing this? Is there a site that may provide step-by-step instructional video or photos? Is this recommended for a novice (like myself) or should I take it to the dealer?

Any help would be appreciated.

Thanks