trim pump-solenoid?

let me preface this by saying that i have never done any work on an outdrive/trim system, being as this is my first boat. okay, the trim pump worked when i was there with the owner checking out the boat, and now it does not. there is no noise at all when i trim up or in, but when i press up and up/out at the same time i get a click coming from what i assume is the solenoid. connections are all fine, i get the same click when i connect the blue (up) lead to the battery+. yes, it is in forward gear. the repair manual makes no mention of this click. can i bypass the solenoid to determine if it is the culprit? how so? what else could it be? i'd like to get this tackled and then move on to replacing the impeller and gear oil in the outdrive. i'm going bow to stern, you see (i know engines well enough, no problems yet), and i don't wish to get ahead of myself. help would be appreciated :).