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Cruise Control Switch and dragging brakes.

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#1
I have had to replace my cruise control switch (the blue one on the brake pedal under the dash) twice since the start of the year, and it's still August. It was also supposed to have been replaced a year ago, too.

I have swapped this switch because it appears to give me brake problems. The first and third switch replacement was to solve dragging brakes. The second switch replacement this March fixed vague brakes (see this thread about that whole saga).

I don't know how I keep killing these switches. I bled my brakes often; I have spent about 10 weekends a year at racetracks doing laps for the last 3 years and I only upgraded to bigger brakes in July. If I need to add one of these switches to my usual brake service parts that's okay, a new switch from Rock Auto is $5 plus shipping. But I would rather figure out how to fix the underlying issue it at least why these switches die on me.


Had anyone else replaced their cruise control switch more than once? If I only had to do this once I wouldn't be as concerned, but this is a ridiculous service interval for a brake switch.


Attached is a picture of the switch I pulled out from under my dash (left/bottom) and a fresh one (right/top). DSC_0180.jpg

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Last edited:

Clint Beastwood

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#2
That's.... weird. I don't really have anything to add but I am interested, so BUMP!

How did you notice the dragging brakes, was it literally like a "I don't roll but the brakes aren't engaged" type thing?
 

Clint Beastwood

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#4
Not to be that guy but historically "bump" means "Bring Up My Post". So typically a "BUMP" would be if you were the OP. Otherwise you can "up" or "tag" for later lol

Just some internetz history for ya :)
I figured it counted since I was giving a freebie nudge to the top by replying instead of subscribing :p
 
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Thread Starter #5
That's.... weird. I don't really have anything to add but I am interested, so BUMP!

How did you notice the dragging brakes, was it literally like a "I don't roll but the brakes aren't engaged" type thing?
I noticed that my car wasn't coasting very well with the clutch in, and then it got to the point where it didn't roll when I was not on the brake pedal. Take offs from a stop were also a little sluggish. It was all kinda subtle, but I've been dealing with this sort of issue on and off for all over a year.

Also, I've got aggressive pads and dragging brakes gets really squeaky.

I blamed the cruise control switch when I unplugged it and suddenly the car moved more freely.

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Clint Beastwood

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#6
I noticed that my car wasn't coasting very well with the clutch in, and then it got to the point where it didn't roll when I was not on the brake pedal. Take offs from a stop were also a little sluggish. It was all kinda subtle, but I've been dealing with this sort of issue on and off for all over a year.

Also, I've got aggressive pads and dragging brakes gets really squeaky.

I blamed the cruise control switch when I unplugged it and suddenly the car moved more freely.

Sent from my H8314 using Tapatalk
I know it's of little help, but... that's weird.
 
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Thread Starter #7
I know it's of little help, but... that's weird.
It's SO weird! And that's why I started a thread.

I can't figure it out, the dealer *didn't* figure it out, and the race shop figured out the pedal deformation thing, but I'm still replacing switches. I keep toying with the idea of just removing the entire ABS system, but I plan to keep my car street legal and I'd rather have as much safety as possible when I'm not at the track.

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Clint Beastwood

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#8
It's SO weird! And that's why I started a thread.

I can't figure it out, the dealer *didn't* figure it out, and the race shop figured out the pedal deformation thing, but I'm still replacing switches. I keep toying with the idea of just removing the entire ABS system, but I plan to keep my car street legal and I'd rather have as much safety as possible when I'm not at the track.

Sent from my H8314 using Tapatalk
ha yeah especially with how on/off the FiST brakes are.
 
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Thread Starter #13
Is this the switch above the brake pedal?


I accidentally switched it with the one next to it and the brakes locked up on the car after driving about 200ft lol.
Yeah, I'm talking about the blue switch on the right side of the brake pedal. I didn't realize the black brake light switch would fit the plug for the CC switch.

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PunkST

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#14
Im wondering if repeat hard stops are crushing the internal plunger. If you bury your foot in the brakes ( enough to deform the pedal box like whats happened to you already. I could see this part failing probably just before youre bending stuff.


EDIT: i looked at how the switch engages/ disengages. From what i gathered there is an internal spring that is probably getting bent or busted when you let the brake pedal slap the plunger really hard letting off the brakes.
 
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Thread Starter #15
Im wondering if repeat hard stops are crushing the internal plunger. If you bury your foot in the brakes ( enough to deform the pedal box like whats happened to you already. I could see this part failing probably just before youre bending stuff.


EDIT: i looked at how the switch engages/ disengages. From what i gathered there is an internal spring that is probably getting bent or busted when you let the brake pedal slap the plunger really hard letting off the brakes.
Maybe. When I get a chance I'll disassemble the old switch in the first photo (the one that isn't extending fully) and see what I can see. I don't side-step the pedal and I'm already trying to be smooth off the brakes, but I wonder if I'm overextending the switch. These issues seem to start if I go *deep* into the pedal, which is mostly when the brakes are being bled, but sometimes when I go off track and I'm "two feet in" trying to get control back in the grass and dirt.
 


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