Autopilot is not engaged and wanders off route

Yeah, if the AP is not engaged it will also not follow the route...

Claygate67, it's hard to help you with such a generic problem statement. Emi is not being a wise-guy with his reply.

Help us help you by being specific. First, be aware that just turning the autopilot on only gives you wings level and (if I recall correctly) maintaining the pitch at the time of turning it on. Following a heading, leveling, climbing and descending require use of the autopilot mode selectors to the right of the elevator trim on the pedestal and use of the heading "bug" on the HSI. The annunciators over the attitude indicator are only that, not selectors.

Take the time to review the "Automated Flight" section of the OM (starts on page 50 in my installation). If you're still having problems, just reply back and we'll try to help, but do be specific with what you did to engage the autopilot and what's not happening that you think should be happening.