Need Help !!! 2004 Gt No Brake Lights

Blake1770

New Member
Sep 13, 2017
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#1
I have a 2004 mustang gt I have no brake lights. I have power every where I have also changed fuses,bulbs,brake switch and also the blinker switch, I am lost can anyone plz help.
 
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RaggedGT

StillWannaBeASuperMod
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Jul 20, 2014
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#2
Welcome to Stangnet.
I moved your thread into the '96-04' section and edited your title . This way more members will see your thread,and drop in with ideas/advice.

When you say you have power everywhere-does that include at the brake light switch? Also have you checked the ground wires?
 

Sketchy_GT

Active Member
Nov 13, 2016
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#3
i had that happen once with an 03 but mine wouldnt come out of park either, i had kicked some of the wires under the dash and the ones for the brake switch came loose
 

Blake1770

New Member
Sep 13, 2017
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#4
The grounds are
Welcome to Stangnet.
I moved your thread into the '96-04' section and edited your title . This way more members will see your thread,and drop in with ideas/advice.

When you say you have power everywhere-does that include at the brake light switch? Also have you checked the ground wires?
The grounds were showing good I have power in and out of the brake light switch.
 

Blake1770

New Member
Sep 13, 2017
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#5
i had that happen once with an 03 but mine wouldnt come out of park either, i had kicked some of the wires under the dash and the ones for the brake switch came loose
All of the wires are tight and have power I checked the wires when I changed the switch.
 

wmburns

SN Certified Technician
Aug 14, 2009
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Houston Texas
#6
CONFIRM +12 volts at the high mounted 3rd brake light using a KNOWN good ground.

IF no voltage at the 3rd brake light but confirmed voltage at the brake pedal switch the problem MUST be a wiring fault between the two locations.

Before chasing a wiring fault I strongly urge you to double check your work or a wild goose chase could be in your future.
 

squeak93

10 Year Member
Jun 2, 2005
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#7
Start in the drivers side kick panel. There are a lot of connectors in there that run from the front harness to the rear of the car. I've seen them get dirty, broken or pinched over the years and cause odd problems.
 

Neuron

Mustang Master
Nov 6, 2016
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#8
Your turn signals and hazards work OK?
 

Blake1770

New Member
Sep 13, 2017
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#10
Start in the drivers side kick panel. There are a lot of connectors in there that run from the front harness to the rear of the car. I've seen them get dirty, broken or pinched over the years and cause odd problems.
I will check that thank you
 

Neuron

Mustang Master
Nov 6, 2016
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#11
Does anyone know if the multi-funcition switch can cause this problem?
 

wmburns

SN Certified Technician
Aug 14, 2009
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Houston Texas
#12
Does anyone know if the multi-funcition switch can cause this problem?
NO! Why? Because the high mounted 3rd brake light does not go through the multi-function switch. Hence the reason why best to over all brake power test location is at the 3rd brake light.
 

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