91 F150 Lariat: Had no brakes or turn signals, only flashers. I replaced the turn signal switch inside the steering column & the relay in the fuse box. Checked & replaced any related fuses (She is a new to me old truck)
Brake lights-CHECK!!
Blinkers blinked one time left, & then nothing. I have no blinkers & no inside lighted arrows. My hazards do not work now either. The new switch is not defective bc it does click left & right as if the turn signals were actually on. What to check next??? Anyone?

 

25 year old wires, a number of past owners.. bad grounds. altered wire paths.


You now have a Project.

 

And as it worked for one blink, prob is when the fuse blew.

 

Start looking around for worn wiring and check the plug for trailerlights for bad wiring.

 

Start at the plug and work your way towards the front. I'm guessing bad wire, something wore through the jacket and is causing a short.

 

99 ford f350 7.3 all lights turn on but brake light hazard or turning signal on driver side tail wont do anything front works back wont. Ive tried swaping bulbs. The multifunction switch looked at wires dnt see anything wrong HELP!!!!!!!

 

99 ford f350 7.3 all lights turn on but brake light hazard or turning signal on driver side tail wont do anything front works back wont. Ive tried swaping bulbs. The multifunction switch looked at wires dnt see anything wrong check fuses as well HELP!!!!!!!

 

You will need an electrical probe and check to see if you have power at the switch and check connection at firewall for corrosion