Okay, trim pump electrical diag needed. Grab a multimeter and check power to up solenoid on the power feed side. Then check switched power to the small positive post on the up solenoid while someone is pressing the trailer up button. If power to the solenoid is good, solenoid needs to be...
Pull fuel sample from fuel/water separator, and look for corrosion under the distributor cap. Rule those two issues first as they are the most common and easy to check
Sounds like you’re on the right track. Lower shift cable connects on the fwd side of the lever in a slot with adjustability. After doing full shift adjustment procedure (looks like you already have), slide that cable up in the slot until good shifting is achieved. Movement in the slot should not...
