One problem related to turn signal switch has been reported for the 2004 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Ford F-150 based on all problems reported for the 2004 F-150.
Turn signals fail intermittently. Sometimes hitting the brake pedal, jiggling turn signal switch or parking, putting the vehicle in "p" then into "d" will get the signals to work. Dealer cannot duplicate the problem (hence the intermittent), but the problem is not fixed. Dealer will not replace parts. The problem began oct. 2005 and continues. The signals will work for days at a time, then fail for hours at a time. This is an accident and traffic citation waiting to happen.