No brake lights

[67twintstang]

Hello to all. I need help! My tail lights turn on and the rear signals work, BUT my brake lights don't turn on when I hit the brakes. I Pushed the brake light switch by hand and nothing. When the tail lights are on and I hit the brakes the light just flicker for a second. I noticed that the red wire from the brake switch was twisted up with two other red wires. I attached some pics. Help please!


By porvida1984, shot with Canon PowerShot S3 IS at 2010-01-1


By porvida1984, shot with Canon PowerShot S3 IS at 2010-01-19

[Dragon]

Bad switch, It has contacts on the side not on the bottom. So no matter how far the peddle goes down it makes contact. Just short the two wires at the back of the switch and check the brake lites. If that does not turn them on the turn signal switch can be bad or the wires going to the turn signal switch or coming out of it.

What year truck do you have as there are two different turn signal wiring schemes?

If you put your truck particulars in the signature of your profile we won't have to ask.

[67twintstang]

Thanks. its a 1970. It looks like the brake light switch isn't the correct one? does anyone have any pics of what the stock one looks like?

[basketcase0302]

67twinstang,
Here's my 71:
http://s240.photobucket.com/albums/ff13 ... g&newest=1

[67twintstang]

67twinstang,
Here's my 71:
http://s240.photobucket.com/albums/ff13 ... g&newest=1

Thanks! I went to napa today and bought a new one hopefully this works!

[67twintstang]

I bought a new switch and still no brake lights!! I'm not sure what the problem is?

[Dragon]

http://www.fordification.com/tech/wirin ... ghts01.jpg

Wire 810 feeds the turn signal switch that then feeds the tail lights. Do you have a test probe or meter?

[fordman]

sounds like a loose wire to me. or a loose connection in the tss. i was bettign on the brake light switch this morning also. trace that added in red wire and see what it goes to.

[67twintstang]

I took a closer look and and there's a red wire coming from the fuse box that is spliced to the red wire on the brake light switch. only 2 wires not three. The truck has factory ac so its hard to look up under the dash.

[Dragon]

sounds like a loose wire to me. or a loose connection in the tss. i was bettign on the brake light switch this morning also. trace that added in red wire and see what it goes to.

Yep after about 20 years the Brake light switch fails in city driving yet the TSS fails about every 30 from plastic faliure but that is why I said short the switch wires together. Then you don't have to guess.

[67twintstang]

where is the tss located?

[Heathcliff68f100]

Under the steereing wheel

[67twintstang]

Thanks for all the info everyone! Here is a pic of the red wire that is spliced into the brake light switch red wire. It comes from the fuse box.


By porvida1984, shot with Canon PowerShot S3 IS at 2010-01-20



By porvida1984, shot with Canon PowerShot S3 IS at 2010-01-20

[Dragon]

Where does the red wire go that is spliced at the switch. Is it the same one that is stuck in the fuse block?

[67twintstang]

Where does the red wire go that is spliced at the switch. Is it the same one that is stuck in the fuse block?

Yes its the same wire. It comes from the fuse box and splices with the red brake light sensor wire.