How do I fix problem turn signals working intermittently

Flasher, sometimes referred to as combination flasher (handles both turn signals and emergency flashers, though via separate circuits, so one may work while the other does not). Solder points begin to disintegrate over time, so it sometimes makes solid connection and other times does not. Had same problem with an '02 Jeep, had replaced turn signal switch and checked all fuses and relays. Finally replaced the flasher (pain to reach), and that fixed it.