Intermittent electrical problems, Fuel pump Starter. fuse connection temp fix

It is used as an arborist vehicle Tows 7X14 foot trailer. mostly short distances up to 25 km.usually. Fuse box clean dry. It all started .when shop was looking for fuse to energize fuel pump and starter solenoid and started pulling and checking fuses for poor contact. then abandoned me, I since solved all problems except for turn signal dim on dash and no flash intermitant.