PLEASE HELP!!!! Brake light issues!!!

2

2KSLOSTANG

New Member

Jan 22, 2023

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Jan 22, 2023

#1

• Jan 22, 2023

• #1

Hey everyone new guy here! I have a 2000 GT Coupe and I’m having issues with the brake lights I have already changed the brake light switch and checked fuses but my issue is I have power at fuse 33 but no power at fuse 41 but if I turn the key on I get 10.5 volts at fuse 41 and 10.5 volts at the switch and I have hyper flash with my turn signals what could be my issue thanks for any help and information!!!

 

S

Shuttleman83

Active Member

Jun 30, 2019

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Jan 22, 2023

#2

• Jan 22, 2023

• #2

Multifunction Switch might be a good start or the wiring to it.

 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

Admin Dude

Jan 4, 1985

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Jan 22, 2023

#3

• Jan 22, 2023

• #3

The ignition switch is also suspect.

 

2

2KSLOSTANG

New Member

Jan 22, 2023

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Jan 22, 2023

#4

• Jan 22, 2023

• #4

Shuttleman83 said:

Multifunction Switch might be a good start or the wiring to it.

Click to expand...

Yeah I was reading something about the multifunction switch so I’m gonna order one and change it and see if that would be the problem.

 

2

2KSLOSTANG

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Jan 22, 2023

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Jan 22, 2023

#5

• Jan 22, 2023

• #5

Noobz347 said:

The ignition switch is also suspect.

Click to expand...

Really the ignition switch I haven’t seen anything about that on anything I have read and it seems to function properly?

 

S

Shuttleman83

Active Member

Jun 30, 2019

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Jan 22, 2023

#6

• Jan 22, 2023

• #6

Use a test light and or multi meter and check out the ignition switch.

 

2

2KSLOSTANG

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Jan 22, 2023

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Jan 22, 2023

#7

• Jan 22, 2023

• #7

Where would I even bring to start testing the ignition switch when I turn the key on everything works as should with key power

 

S

Shuttleman83

Active Member

Jun 30, 2019

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Jan 22, 2023

#8

• Jan 22, 2023

• #8

KOEO, test light to ground, multi meter would be a great start. You said 10.xx voltage at fuses they should be around 12 or so.

 

2

2KSLOSTANG

New Member

Jan 22, 2023

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Jan 22, 2023

#9

• Jan 22, 2023

• #9

Shuttleman83 said:

KOEO, test light to ground, multi meter would be a great start.

Click to expand...

Ok what is KOEO sorry not familiar with that term

 

S

Shuttleman83

Active Member

Jun 30, 2019

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Jan 22, 2023

#10

• Jan 22, 2023

• #10

Key On, Engine Off where the key is set a certain notch in the tumbler forward but not fully started or on.

 

2

2KSLOSTANG

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Jan 22, 2023

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Jan 22, 2023

#11

• Jan 22, 2023

• #11

Shuttleman83 said:

Key On, Engine Off where the key is set a certain notch in the tumbler forward but not fully started or on.

Click to expand...

Ok but would that even be an issue seeing that the brake lights work off a 12v constant power and not keyed power

 

D

Deleted member 38176

Jan 24, 2023

#12

• Jan 24, 2023

• #12

Is this an auto car?

 

2

2KSLOSTANG

New Member

Jan 22, 2023

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Jan 25, 2023

#13

• Jan 25, 2023

• #13

No it’s manual

 

2

2KSLOSTANG

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Jan 22, 2023

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Jan 25, 2023

#14

• Jan 25, 2023

• #14

Nightfire said:

Is this an auto car?

Click to expand...

No it’s manual

 

manicmechanic007

5 Year Member

Sep 26, 2017

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Roy, Utah

Jan 25, 2023

#15

• Jan 25, 2023

• #15

You better check the sockets and all the bulbs (first)
You have ground back feeding somewhere
Take all the bulbs out and install just a couple then check it again
When the sockets fail strange things happen sometimes
Check the brake light switch connector for a broken wire (the wires bend back and forth when hitting the brakes)
The wires break inside the insulation

 

manicmechanic007

5 Year Member

Sep 26, 2017

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Jan 25, 2023

#16

• Jan 25, 2023

• #16

Post 2 is a good one
The wires sometimes get pulled out (or partially out) of the multifunction switch
Worse when using the tilt a lot