Half Power, Brake lights on, HELP!
Thread Starter
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Joined: Mar 2015
Posts: 52
Likes: 1
From: Texas Hill Country
Half Power, Brake lights on, HELP!
Hey folks.
Looking for help please. My car, with no lead up that something is wrong, just went to half power with the brake lights being always on. Literally, we noticed that the brake lights were on one evening, so I started the car to see if that would make a difference. I drove out of the driveway and barely made it up the hill to the main road. No warning lights, no diagnostic warning on my little scanner. Just no power with the lights on. The engine will rev somewhat, but not fully, and she won't accelerate at all.
And that's all I've got to give. No other symptoms. No warning, nothing else.
I will do a search on the site, but I'm not good at it. Just being honest.
Need help please, as I hate going to the dealer. I've been given the runaround by them one time too many.
2008 G37s, automatic
David
Looking for help please. My car, with no lead up that something is wrong, just went to half power with the brake lights being always on. Literally, we noticed that the brake lights were on one evening, so I started the car to see if that would make a difference. I drove out of the driveway and barely made it up the hill to the main road. No warning lights, no diagnostic warning on my little scanner. Just no power with the lights on. The engine will rev somewhat, but not fully, and she won't accelerate at all.
And that's all I've got to give. No other symptoms. No warning, nothing else.
I will do a search on the site, but I'm not good at it. Just being honest.
Need help please, as I hate going to the dealer. I've been given the runaround by them one time too many.
2008 G37s, automatic
David
Premier Member
Joined: Nov 2017
Posts: 359
Likes: 102
From: SoMD
I would suggest lifting the car on jack stands following all safe jacking procedures and see if you are able freely spin all four of the wheels.
What you are experiencing can happen when the rubber flex lines for the brakes begin to fail internally, and although they allow the high pressure feed from the brake master cylinder to actuate the caliper, the pressure can not release due to blockage of the rubber flex line caused by a material failure of the line.
This could also be due to a stuck caliper on the non-sport model, which is something that typically happens as a result of road salt induced corrsion of the caliper slides.
Both of these scenarios have happened to me in the past on other vehicles.
What you are experiencing can happen when the rubber flex lines for the brakes begin to fail internally, and although they allow the high pressure feed from the brake master cylinder to actuate the caliper, the pressure can not release due to blockage of the rubber flex line caused by a material failure of the line.
This could also be due to a stuck caliper on the non-sport model, which is something that typically happens as a result of road salt induced corrsion of the caliper slides.
Both of these scenarios have happened to me in the past on other vehicles.
Thread Starter
Registered Member
Joined: Mar 2015
Posts: 52
Likes: 1
From: Texas Hill Country
Both issues?
Either the brake switch went bad (unlikely) or the rubber pad/,bump stop rotted away (more likely).
See post
See post
Also, getting to those brake switches, is that an inside the cab job or outside?
Thank you for the link.
David
Thread Starter
Registered Member
Joined: Mar 2015
Posts: 52
Likes: 1
From: Texas Hill Country
All four?
I would suggest lifting the car on jack stands following all safe jacking procedures and see if you are able freely spin all four of the wheels.
What you are experiencing can happen when the rubber flex lines for the brakes begin to fail internally, and although they allow the high pressure feed from the brake master cylinder to actuate the caliper, the pressure can not release due to blockage of the rubber flex line caused by a material failure of the line.
This could also be due to a stuck caliper on the non-sport model, which is something that typically happens as a result of road salt induced corrsion of the caliper slides.
Both of these scenarios have happened to me in the past on other vehicles.
What you are experiencing can happen when the rubber flex lines for the brakes begin to fail internally, and although they allow the high pressure feed from the brake master cylinder to actuate the caliper, the pressure can not release due to blockage of the rubber flex line caused by a material failure of the line.
This could also be due to a stuck caliper on the non-sport model, which is something that typically happens as a result of road salt induced corrsion of the caliper slides.
Both of these scenarios have happened to me in the past on other vehicles.
Thanks
David
Premier Member
Joined: Nov 2017
Posts: 359
Likes: 102
From: SoMD
Yes, you could also do one wheel at a time. What ever works and is safest.
You are just checking to make sure the wheels spin freely. Car will have to be in neutral with the parking brake off.
make sure to block / chock the wheels before putting it in neutral. Otherwise it might roll away.
You are just checking to make sure the wheels spin freely. Car will have to be in neutral with the parking brake off.
make sure to block / chock the wheels before putting it in neutral. Otherwise it might roll away.
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