Trim up works fine on both thumb button and trailer button. When you push the trim down button you hear a click back at the hydraulic pump but the electric motor does not run. If you continue to press and release the button, sometimes as many as 30 times it will eventually work. Any suggestions.
The problem is either at the switch or the down solenoid at the trim pump. Take a jumper wire and go from 12v positive to the post with the green wire on it at the solenoid. If it works then you have either a connection problem at the small round plug at the trim pump or somewhere in the wiring to the control or even at the control itself.