rear brake lights dont work, 3rd does
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New User
Joined: May 2006
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rear brake lights dont work, 3rd does
Thanks in advance for your help!!
I have a 99 f150. The rear brake lights dont work. However the 3rd brake light, above the rear window, works fine. Checked all fuses,bulbs, and wiring connections under the truck. I have a feeling the problem is in the steering colum. Is there anything else I should check first??
Thanks very much!
I have a 99 f150. The rear brake lights dont work. However the 3rd brake light, above the rear window, works fine. Checked all fuses,bulbs, and wiring connections under the truck. I have a feeling the problem is in the steering colum. Is there anything else I should check first??
Thanks very much!
New User
Joined: Dec 2004
Posts: 23
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From: Tallahassee
Flashers?
Do your signal/4-way flashers work? The tail/stop light circuit routes through the flashers. The third light is a direct connection. That's why the brake light flashes when you have the brake on at a stop light with the turn signal going. Replace both flashers.
Mike
Mike
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Joined: Jan 2001
Posts: 56,984
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From: Virginia
Actually it does not route through the flashers, but routes through the turnsignal switch. Ford calls this the "multi-function" switch. They have had numerous problems with this switch, and also with the wiring being too tight and getting pulled out of the plug to this switch. If you have a wiring problem, sometimes you can move the tilt wheel and it will start working again. So your column theory is probably correct.
Postmaster
Joined: Oct 2003
Posts: 4,516
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From: SoCal
Your results might vary, but heres how a 97 Explorer is wired.
Fuse to brakelight switch/BLS
BLS to a splice
From splice to the center brakelight fuse & then to the center brakelight.
And from the splice to Lamps out module/LOM & then to the outer brakelights.
If your truck is equipped with the lamps out warning on the dash, the LOM is a very common problem on these.
Lots of guys have resoldered the connections on the LOM to fix this.
Fuse to brakelight switch/BLS
BLS to a splice
From splice to the center brakelight fuse & then to the center brakelight.
And from the splice to Lamps out module/LOM & then to the outer brakelights.
If your truck is equipped with the lamps out warning on the dash, the LOM is a very common problem on these.
Lots of guys have resoldered the connections on the LOM to fix this.
Moderator
Joined: Jan 2001
Posts: 56,984
Likes: 2,738
From: Virginia
Something you have to watch out for is a lot of Explorers have yellow turnsignals in the rear. This is the European way of doing things and is becoming more and more common.
In this type of configuration, the brake lights do not go through the turnsignal switch(multi-function switch) but instead have their own dedicated red lights in the rear, with seperate amber lights for the turnsignals.
The American way of doing things is having one red bulb that has a filament that has two jobs, being the turnsignal and brake light all in one. I believe your f150 is like this, so the brakes will run through the turnsignal switch.
In this type of configuration, the brake lights do not go through the turnsignal switch(multi-function switch) but instead have their own dedicated red lights in the rear, with seperate amber lights for the turnsignals.
The American way of doing things is having one red bulb that has a filament that has two jobs, being the turnsignal and brake light all in one. I believe your f150 is like this, so the brakes will run through the turnsignal switch.
