Turn signals not working

[Invictus]

Great thread. New here and a complete novice!!! BUT loving the information- thank you. I have a 1971 F100. Just got it yesterday and love it. Turn signal and hazards do not work. I put a new fuse in as the last one had blown. Soon as I hit the switch after it blew again and smoked up.

Planning on replacing the switch to start with and then going from there. All the other lights work, lights in the dash works, wipers work. There are two fuses burnt and I’m not sure what the second one is for.

[390FE1972]

Here is a diagram that shows the fuse box, you can see where the writing is on the fuse box and what each fuse goes to:

http://www.fordification.com/tech/wirin ... epanel.jpg

Regards

[sargentrs]

And here's the diagrams for the 70 and 72. Unfortunately we don't have one for the 71 but it's virtually identical.
http://www.fordification.com/tech/wirin ... master.jpg
http://www.fordification.com/tech/wirin ... _quick.jpg

[390FE1972]

You said you are going to replace the switch, if you are talking about the Turn Signal Switch, here is an excellent thread on rebuilding an automatic steering column, it has information on how to replace the Turn Signal Switch.
http://www.fordification.com/forum/view ... =5&t=72274

Here is how one guy did it on youtube:
https://youtube.com/watch?v=F1-npbr50Do
https://youtu.be/5zqCQuUwLno

Keep us updated on your progress!

Regards

[cep62]

I'd Try to figure why the fuse blows before I change the switch.
It might be some jacked up wiring in back from a previous owners trailer job.
An old trick was to wire a headlight bulb in place of the fuse , (alligator clips),that way you can wiggle wires until the light goes out.
then fix the short.

[cep62]

I'd Try to figure why the fuse blows before I change the switch.
It might be some jacked up wiring in back from a previous owners trailer job.
An old trick was to wire a headlight bulb in place of the fuse , (alligator clips),that way you can wiggle wires until the light goes out.
then fix the short.

(The headlight will take the place of the fuse so you don't smoke the wires.)

(Wrong button for edit)

[390FE1972]

I'd Try to figure why the fuse blows before I change the switch.
It might be some jacked up wiring in back from a previous owners trailer job.
An old trick was to wire a headlight bulb in place of the fuse , (alligator clips),that way you can wiggle wires until the light goes out.
then fix the short.

cep62, could you please elaborate on how you use the headlight bulb and the alligator clamps, where do you place the clamps on the headlight bulb etc. I would like to use this method in the future, but I need clarification on exactly how you do this.

Thanks

[cep62]

Get the plug for a headlight with a foot or so of wire, and put the alligator clips on the ends.
When testing , clip onto the fuse terminals so now the headlight is the fuse and the shorted wire is the ground.
The headlamp uses enough current so you don't overheat the wires, when you fix the short the lamp goes out .
This way you don't use up a box of fuses.
You can also use flat terminals for the newer type fuses.

I knew a guy that put an old key buzzer in line so he wouldn't have to look at the light he could hear it
from under the truck.

[390FE1972]

Get the plug for a headlight with a foot or so of wire, and put the alligator clips on the ends.
When testing , clip onto the fuse terminals so now the headlight is the fuse and the shorted wire is the ground.
The headlamp uses enough current so you don't overheat the wires, when you fix the short the lamp goes out .
This way you don't use up a box of fuses.
You can also use flat terminals for the newer type fuses.

I knew a guy that put an old key buzzer in line so he wouldn't have to look at the light he could hear it
from under the truck.

Thanks! That's very helpful information