Originally Posted by mmwjr
If the solenoid coil is bad there will be no sound. First check for 12V on the small terminal green/white wire and the the other small terminal is connected to ground. Then check the large terminal green/white wire. This needs to be done with the down switch pressed.
The Trim Out and the Trailer ride on the same solenoid, don't they? I only recall a Solenoid for up (out) and a solenoid for down (IN).
Since the Trim is working, can we assume that the drive is only raising to the trim limiter? (Approx. 6 'clicks' up) . If this is the case and the trailor button isn't working (both alone and in conjunction with the up switch), then wouldn't it make sense to look at the switch for trailor on the shifter or helm (or wherever it's located)?