I installed 2 new trim solenoids on my port side, work ok for a short time, then I loose electrical power to solenoids. I have remove the connections and clean and reinstalled, worked fine for few hours and stop working again. Anybody have any suggestion where to look for other possible problems?

I checked all my wire connections from switches to pumps, also checked the relays in the black box (dual power trim system) and check- out ok! I decided to check all my connections on the trim solenoids again for the 4-6 times, connections ok, I then put a test light and voltmeter on the 110 amp fuse next to the solenoid, ( big surprise!), the positive wires connected to the fuse is 12v, but the volts coming out of the fuse was so low that the test light was very,very dim. I tested the starboard 110 amp fuse and voltage on both side of the fuse is correct, so I took that fuse and put it on my port side to test, my outdrive went up and down with the trailer switch and throttle mounted trim switch. I spend many hours testing, I'm so happy to find out what the problem was, hope this information help other people with power trim problems.