Chevy

Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Chevy

Chevrolet Silverado, Power at the fuse but brake lights

Customer Question
Chevrolet Silverado, Power at the fuse...
Chevrolet Silverado,
Power at the fuse but brake lights don't work.
Submitted: 1 year ago.Category: Chevy
Show More
Show Less
Ask Your Own Chevy Question
Answered in 1 hour by:
5/18/2016
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago
Don - Mo Lurch
Don - Mo Lurch, Auto Mech / Electronics
Category: Chevy
Satisfied Customers: 21,087
Experience: Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.
Verified

.

sorry for the delay............
.
Please post Model of Silverado & if Automatic or 4x4
Greetings...... “Hi, I’m Don (aka MOLurch) and I look forward to helping you!”
.
IF you have Voltage + on "both sides" of the Fuse, then test the ORANGE wire at the Brake Switch under the dash with Key ON
IF there is Voltage +
Test the WHITE wire at the Brake Switch with Pedal pushed down
Let me know what you find

.
IF you need more information, please ask "prior" to Rating.
.
Please do the right thing and leave a rating, using the rating system, so I may be credited for this Q&A.
.
NOTE: Do NOT Rate on how much TIME you waited, because I am not on 24 / 7 and I answer as soon as I see the question.
The question will still remain open for follow up questions if needed.
.
If for any reason, you can't rate my answer OKAY, GOOD, or EXCELLENT today.
Please reply and let me know why, so I can help more/better.
.
Rating is very Important to our Service
.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I'll try this tommorrow
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

please let me know

thank you

Ask Your Own Chevy Question
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

Please post Model of Silverado & if Automatic or 4x4

Ask Your Own Chevy Question
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

The plug you show in picture is:
Brake/Clutch Harness To Beacon Harness (With RPO Code 5G4/TRW)
.

The wires I need checked is plugged into the Brake Pedal Switch which is mounted to the Brake Pedal Arm
It is a "6" PIN Connector

Ask Your Own Chevy Question
Customer reply replied 1 year ago
It s 2500hd Silverado, automatic 4x4
Customer reply replied 1 year ago
Orange no power
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

thanks for the added info

which ORANGE wire are you referring to?
the one in your picture or at the Brake Switch?
Which Fuse did you check?
Is there Voltage + on "both sides" of Fuse?

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I checked fuse and there is power at fuse. No power on Orange at brake pedal
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

you posted that there is "power at fuse".........?
Is there Voltage on "both sides of Fuse" & is it Fuse "STOP LP" in the under Hood Fuse Box?
IF so, & there is Voltage + on "both sides of Fuse, then you have a break from the Fuse Box to the Brake Pedal Switch

Using a long piece of wire:

Connect one end of a piece of wire to Fuse "STOP LP"
Connect the other end of the piece of wire to the ORANGE wire at the Brake Switch Plug
does brake lights work?

Ask Your Own Chevy Question
Customer reply replied 1 year ago
Power on both sides of fuse StopLp
Under hood no power at brake. Daughter is graduating College. So I won't do the wire test until Monday
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

thanks......I know about graduating this week....2 more girls to go.........
Let me know what you find

thanks

Ask Your Own Chevy Question
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

Did you need more info?
Please respond or Rate my answer

thank you

Ask Your Own Chevy Question
Customer reply replied 1 year ago
Hey Don,
I tried jumping the wire from fuse to orange and I also tried the white. There was power at the end of the jumper but no brake lights also tried pressing pedal but no response.
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

was this at the "6" PIN Connector on the Brake Pedal?
Does the 3rd Brake Light work?

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I did connect it to the #6 orange on brake pedal.
Chevy Mechanic: Don - Mo Lurch, Auto Mech / Electronics replied 1 year ago

sorry I will opt out, as I do not believe we are communicating
please do not respond to this, as it will lock question
IF someone else has more info, they will post here

Ask Your Own Chevy Question
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago
Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,526
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

Hi there. Different expert here.

System voltage at the STOP LP fuse, but not at the Orange wire on the stop lamp switch connector, indicates an open circuit. To test, temporarily run a fused jumper in place of the Orange wire from the fuse to the stop lamp connector. If stop lamps work, trace and repair open circuit between stop lamp switch connector and underhood fuse box - as an option, and since this is a dedicated circuit for the stop lamps, you could also run a new wire from the fuse box to the stop lamp switch to replace the existing circuit running through the Orange wire.

Please let me know if you have any other questions.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I'll check it in am
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

I'm usually online weekdays from 2 to 8PM EST. Look forward to hearing from you then.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
Juan,
Sorry for delay but I am working on my brake issue again. The fuse is live but when I do a continuity test the orange wire at the fuse is not the wire connected to the brake pedal. The orange wire is the wire hanging unplugged under the dash. I showed this to the other tech and he said it was brake clutch harness to beacon harness. But that orange wire is the one directly connected to the brake fuse . I jumped that wire to the orange wire and also tried the white wire on brake pedal with no luck.
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

I don't have a problem with the delay, but I do with you doing things I didn't recommend doing. Please follow the instructions as I previously posted:

"To test, temporarily run a fused jumper in place of the Orange wire from the fuse to the stop lamp connector. If stop lamps work, trace and repair open circuit between stop lamp switch connector and underhood fuse box - as an option, and since this is a dedicated circuit for the stop lamps, you could also run a new wire from the fuse box to the stop lamp switch to replace the existing circuit running through the Orange wire."

I'd understand if you want to do things your own way instead of following my advice, but, if that's how you want to procedd, then I wouldn't be able to help you. Please let me know if you have any questions.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
The problem is that another tech has also instructed me to try things. Is the stop lamp connector the orange wire on the brake pedal?
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

OK. The no-stop lamp issue is mostly caused by bad connections. The next place that you should check is at the junction block for the rear lamps located on the left frame rail near the rear of the vehicle.

Look at the attached diagram and you will see the connector legend next to the highlighted junction block. With brakes applied, you'll be checking power coming in and out of the junction block (Lt Blue wire in and out)

Please let me know what you find.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
There is two light blue wires at the junction box. No power to either with key on and brake pedal depressed.
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

According to the diagram there should be three Lt Blue wires; one bringing power to Blue connector C1 terminal 8; another Lt Blue wire carrying power from Gray connector C2 terminal 7 to the Left Stop Lamp; and yet another Lt Blue wire carrying power from Black connector C4 terminal 7 to the Right Stop Lamp.

If the junction block is bad, there'll be power only coming in to the Blue connector.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
I didn't get power on the two that I tried. The backup, running lights work ok. Think turn signals also but not positive. I'll check three lt blue wires coming in to box in am
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

OK. Please remember that I'm online weekdays from 2 to 8PM EST.

Ask Your Own Chevy Question
Customer reply replied 1 year ago
Jaun,
Just to give you alittle perspective, this truck was a roll over. I replaced the cab but used the original wire harness etc.
So let's recap ,
There is power at the 25 brake fuse under hood.
There is no power to the orange wire on brake pedal.
If I use a fused jumper and press pedal there is no brake lights.
With pedal depressed there is no power to the two Lt blue wires at the rear plug also there is only two Lt blue wires coming into that junction terminal. Photo attached
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

OK. The wire may have a different color, but I doubt it (look at the attached diagram). Check for power at the wire going to the Blue connector terminal 8. If there is power there, the junction block is bad and needs to be replaced.

I have to take my wife to the airport. I'll be back this afternoon to check on your progress.

Ask Your Own Chevy Question
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

I don't understand; how can there be no power to any terminal on the Blue connector, yet the tail lamps work when you plug it in?

Also, that connector in the picture looks to be dirty or contaminated. Did you backprobe the wires to see if there was power at any of them?

Lastly, I uploaded a diagram for you showing the Orange wire feeding power to the STOP LP fuse; then a Light Blue wire going from the fuse box to terminal 8 of that Blue connector you took a picture of. Did you check that Light Blue wire for power?

Ask Your Own Chevy Question
Customer reply replied 1 year ago
Juan,
I think I'd like another expert.
Chevy Mechanic: Juan Crespo, ASE Certified Technician replied 1 year ago

Not a problem. Please don't reply until another expert responds or the site will cycle this request back to me.

Ask Your Own Chevy Question
Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Chevy
Satisfied Customers: 1,526
1,526 Satisfied Customers
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European

Juan Crespo is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money.

Todd LRochester NY

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Chevy Technician

15,249 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Gary

Gary

Chevy Technician

9,196 satisfied customers

15 years GM master tech

Tim&#039;s Auto Repair

Tim's Auto Repair

mechanic

8,847 satisfied customers

Have owned a repair shop for 25 yrs.

Dave Nova

Dave Nova

Chevrolet Technician

7,092 satisfied customers

ASE Master Certification. GM World Class Certification

John

John

Master A.S.E Automotive technician

4,071 satisfied customers

A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician

Don - Mo Lurch

Don - Mo Lurch

Auto Mech / Electronics

21,087 satisfied customers

Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

Ron Z.

Ron Z.

- Chevy Tech -

2,682 satisfied customers

18+yrs experience. State Inspector and Chevy Diagnostics

< Previous | Next >

Related Chevy Questions
2005 Chevy express van 2500. No brake lights turn signals or
No brake lights turn signals or bakup lights I've checked all uses both locations changed fuses even if not bad and changed flasher unit … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Turn on headlights and tail lights and turn signals and
turn on headlights and tail lights and turn signals and brake lights don't work … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,249 satisfied customers
My rear brake/turn signal lights worked fine until a day or
My rear brake/turn signal lights worked fine until a day or two after replacing the steering wheel/column. First the left went, then right and brakes. Circuit boards are new, bulbs/fuses are fine. 88 … read more
eric remington
eric remington
FORMER SHOP OWNER/TECHNICIAN/INSPECTOR
associates degree
290 satisfied customers
Left rear turn signal and running light not working and
left rear turn signal and running light not working and cruise control stops when right turn signal engaged. … read more
GM Tech (Cam)
GM Tech (Cam)
Chevy Technician
Vocational, Technical or Trade Scho
15,249 satisfied customers
Left turn signals does'nt work and right turn signal stays
left turn signals does'nt work and right turn signal stays on-2008 chevy hhr … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
We have turn signals, but only the high level brake light.
We have turn signals, but only the high level brake light. … read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
When I put either right or left turn signal on and hit brake
when I put either right or left turn signal on and hit brake both brake lights and turn signals flash … read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
1994 GMC K1500 Brake lights,Hazzards, and turn signals
1994 GMC K1500 Brake lights,Hazzards, and turn signals stopped working. Power to the fuses and fuses are good. … read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
The left rear turn signal and brake light are not working. I
The left rear turn signal and brake light are not working. I check the bulb and it's fine. I replaced with another bulb and still does not work. The front light as well as the dash indicator are worki… read more
Dan
Dan
Dealership Technician
182 satisfied customers
No left turn signal or brake light or and dash lights go off
No left turn signal or brake light or flasher and dash lights go off when I press brake pedal … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
How is the turn signal switch powered? No brake lights, turn
No brake lights, turn signals or hazards. new tail light circuits, brake switch, bulbs and fuses. Grounds are good… read more
Joecamel90
Joecamel90
Technician
Associate Degree
24 satisfied customers
I have no brake lights or turn signals. I've been having
i have no brake lights or turn signals. I've been having trouble with the wiring after towing a trailer one day and someone tried to look at it but i fear they may have made matters worse … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
No power to drivers rear turn signal or brake light.
no power to drivers rear turn signal or brake light … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
I have no brake lights, turn signals, or hazard lights.
I have no brake lights, turn signals, or hazard lights. Already replaced lighting control module. … read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Rear brake & turn signal won't work on my 2008 3500 box
Rear brake & turn signal won't work on my 2008 3500 box truck I replaced lights & pedal sensor … read more
Jerry Newton
Jerry Newton
Vocational, Technical or Trade Scho
2,066 satisfied customers
My 99 tahoe has no brake lights and no rear turn signals.
my 99 tahoe has no brake lights and no rear turn signals. the front signals both flash fast. have tail lights but no hazard lights. replaced brake switch circiut test all fuses and bulbs. please help … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Can't find the electrical ground for the turn signals/ brake
Can't find the electrical ground for the turn signals/ brake lights … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
1,879 satisfied customers
Passenger turn signal comes on when brake is applied. have
passenger turn signal comes on when brake is applied. … read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
893 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x