1999 BMW 528i Turn Signal Stuck On

Suggested Repair

Inspect the turn signal switch first, as it may be shorting internally. Also check whether the right turn signal circuit is shorted to the left turn signal circuit.

Conversation Summary

The owner of a 1999 BMW 528i reported the right turn signal activating by itself and later staying on unless the left signal was selected. Experts said the turn signal switch is likely shorting and that the right circuit may be shorted to the left circuit, so the switch should be checked first.