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 9Likes
06-07-2004, 09:40 AM
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CC Member
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Join Date: Oct 2003
Location: Queen Creek,
AZ
Cobra Make, Engine: Midstates, Vette suspension, Baer 6P brakes, 540 cid Chevy, Haltech Fuel Injection
Posts: 906
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Not Ranked
I had this type of switch years ago. They fail with regularity and I've gone to a normally closed plunger switch atop the brake pedal arm. Made a little bracket for it and have not had any problems with it for many years.
Also, if the orientation of the pressure switch makes a difference due to a bubble, don't you worry that air is in the system and cannot be bled?
__________________
E. Wood
ItBites
10.69 @ 129.83mph - on pump gas and street tires
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06-07-2004, 02:15 PM
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CC Member
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Join Date: May 2003
Location: Jupiter/Tequesta,
FL
Cobra Make, Engine: BDR#078,408 Dart Block, TKO 600,Indigo Blue, White Stripe
Posts: 315
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Not Ranked
Junket,
Where did you purchase the Sorensen #SLS62 , an auto parts store or an electrical supply house?
Jay B
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JayB
Jupiter, FL
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06-30-2004, 07:05 PM
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CC Member
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Join Date: Mar 2004
Location: Newport Center,
VT
Cobra Make, Engine: ERA Slabside 3016, BRG
Posts: 67
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Not Ranked
I was checking mine out this evening so that I can get it inspected tomorrow morning. I also have no brake lights. This is getting frustrating fast. So far I have driven it onto a trailer to tow it 450 miles home and immediately put it into the garage until I could legally drive it after inspection. I really want to drive it this weekend. With as short as summer is in Vermont one can't afford to waste too many weekends.
ChuckG
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06-30-2004, 07:57 PM
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CC Member
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Join Date: May 2003
Location: Hudson Valley NY,
NY
Cobra Make, Engine: Backdraft, 302, Tremec 3550. #038
Posts: 863
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Not Ranked
ChuckG
I know the feeling, mine sat for 2 months after I got it. Took that long to get it insured and registered. Talk about anticipation.
I don't know whats worse, finding out the lights don't work immediately or driving it for 2-3 months before someone told me about it. Think of all the times I could have been rearended. Just lucky I guess.
I was able to fix the problem very easily by going to a CARQUEST auto store and buying part #SLS-66 (switch stoplight). Its a mechanical switch that is cylindrical in shape with a push button on the one end and threads for adjustment on the other end, $8.00. I was able to bend a bracket for it out of stuff I had laying around. (L brackets) I attached it to the square plate which holds the throttle cable in place, already had the hole drilled through it. Then I disconnected the two wires from the brake pressure switch and pulled them back through the fire wall over to the new switch and connected it. PRESTO I now have brake lights that come on with the slightest tap of the pedal.
I'll be honest, it took me about 2 - 2 1/2 hours to do, only because it is a very tight, awkward place to work and I tried different brackets which I bent either too much or to little. Its not complicated at all, just challenging, and I'm not a big guy. Next time I would put the car up on jack stands to get it off the ground, that might make it a little more comfortable to work on.
Hope this helps and good luck with the car.
Welcome to the club !!!
Trueoo7
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Kids in the backseats cause accidents, accidents in the backseat causes kids ! Good reason to get a Cobra !!!
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07-01-2004, 02:48 PM
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CC Member
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Join Date: May 2003
Location: Jupiter/Tequesta,
FL
Cobra Make, Engine: BDR#078,408 Dart Block, TKO 600,Indigo Blue, White Stripe
Posts: 315
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Not Ranked
Ture007
Sounds like a great conversion, could you possibly post a picture of the finish product.
Jay B
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JayB
Jupiter, FL
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07-01-2004, 04:55 PM
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CC Member
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Join Date: Mar 2004
Location: Newport Center,
VT
Cobra Make, Engine: ERA Slabside 3016, BRG
Posts: 67
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Not Ranked
I finished replacing the pressure switch. Easy job and the original was defective. But, soon Ill follow Trueoo7's advice and replace it with a mechanical switch from Carquest. Thanks for the help. I'll be getting it inspected tomorrow and putting some miles on this weekend. Finally!
ChuckG
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07-02-2004, 08:31 PM
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CC Member
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Join Date: May 2003
Location: Hudson Valley NY,
NY
Cobra Make, Engine: Backdraft, 302, Tremec 3550. #038
Posts: 863
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Not Ranked
JayBar
I knew that sooner or later I would have to learn how to post pictures. I will work on it as soon as I get back from vacation.
Trueoo7
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Kids in the backseats cause accidents, accidents in the backseat causes kids ! Good reason to get a Cobra !!!
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10-10-2004, 04:13 PM
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CC Member
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Join Date: Sep 2001
Location: Tulsa,
OK
Cobra Make, Engine: SPF 148 with 427 SO
Posts: 629
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Not Ranked
Ok, I need some help here as well, but my car is SPF. I have a pressure switch screwed into the master cylinder and has wires going into a small box that has other wires going into it. Is it the sensor that screws into the master cylinder or the small black box ??? that everyone says fails?
Thanks
Buzz
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10-10-2004, 06:04 PM
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CC Member
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Join Date: Mar 2004
Location: Newport Center,
VT
Cobra Make, Engine: ERA Slabside 3016, BRG
Posts: 67
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Not Ranked
Buzz, It is the pressure switch that screws into the master cylinder. Just disconnect the two wires, unscrew the pressure switch, hold your finger on the hole until you are ready to put the new switch in. You should loose only minimal brake fluid. Then reconnect the wires. Pretty simple fix. I still haven't changed to a mechanical switch because the pressure switch that I put in has been working fine for 4 months now.
Chuck
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09-15-2014, 06:37 PM
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CC Member
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Join Date: Feb 2010
Location: Honolulu HI, East Haddam, CT, Middletown,
HI
Cobra Make, Engine: BDR #656 402 SR TW
Posts: 179
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Not Ranked
Thanks for the thread guys. Was pretty easy to change out and I'm a poster child for lack of any mechanical skill.
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05-20-2018, 08:25 AM
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CC Member
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Join Date: Feb 2016
Location: San Antonio,
TX
Cobra Make, Engine: BDR #509, 347 S
Posts: 103
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Not Ranked
Resurrecting an old thread here. Went to a show yesterday and suddenly had no brake lights... bad switch. Just wondering... hydraulic switches... has anyone tried a Wilwood 300-11181? If so... results?
https://www.wilwood.com/hardware/har...emno=300-11181 |
05-20-2018, 09:12 AM
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CC Member
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Join Date: Dec 2015
Posts: 1,442
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Not Ranked
That part probably will work. I stuck with what others had used as I wasn't sure if the port was metric or not and wanted to do a no-bleed quick swap. I used Beck/Arnley PN: 201-1087 used on 64 Beetle thru 89 Porsche 911.
https://www.amazon.com/gp/product/B0...ustomerReviews |
05-20-2018, 03:52 PM
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CC Member
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Join Date: Feb 2016
Location: San Antonio,
TX
Cobra Make, Engine: BDR #509, 347 S
Posts: 103
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Not Ranked
Thanks spdbrake. I'll be going "in search of" tomorrow... and thought with their reputation for brakes... maybe it carries over to their switches. Maybe not... it was just a thought... and I thought I'd try to give the thread another option not mentioned previously.
They're rated at 15 amps... the same amperage used for my brake light circuit (I was surprised that most switches I've looked at today seemed to be 20 amps)... have a closing circuit of 60 to 100 psi (possibly as low as 30 psi)... and fit 1/8" NPT. But... I can't seem to find any info on the threads for the existing one... including the one you referenced.
Last edited by BDR_Boy; 05-20-2018 at 03:55 PM..
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05-20-2018, 06:05 PM
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CC Member
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Join Date: Dec 2015
Posts: 1,442
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Not Ranked
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05-21-2018, 04:37 AM
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CC Member
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Join Date: Feb 2016
Location: San Antonio,
TX
Cobra Make, Engine: BDR #509, 347 S
Posts: 103
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Not Ranked
Nice! I didn't check Rockauto... didn't even occur to me. I order so little through them... I forget what a reference they can be.
Then the Wilwood part wouldn't work... as it's 1/8" NPT. I have already ordered the Beck/Arnley Part this morning. Thank you.
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05-22-2018, 01:39 PM
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CC Member
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Join Date: May 2014
Location: Tavares,
FL
Cobra Make, Engine: Backdraft #832
Posts: 227
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Not Ranked
I always carry a spare switch with me.
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05-22-2018, 02:42 PM
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CC Member
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Join Date: Feb 2016
Location: San Antonio,
TX
Cobra Make, Engine: BDR #509, 347 S
Posts: 103
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Not Ranked
Good to know Jimbo... glad I ordered two... I'll put the other one in my tool roll.
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05-22-2018, 05:20 PM
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CC Member
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Join Date: Feb 2010
Location: Honolulu HI, East Haddam, CT, Middletown,
HI
Cobra Make, Engine: BDR #656 402 SR TW
Posts: 179
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Not Ranked
I put in new pressure switch, no problem since
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05-28-2018, 05:25 PM
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CC Member
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Join Date: May 2015
Location: Mokena,
IL
Cobra Make, Engine: Backdraft SBF-302
Posts: 326
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Not Ranked
I'm rebuilding this car one piece at a time.
I've heard that can be an expensive hobby.
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05-29-2018, 07:10 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
I have used the same type of switch in three cars and they each has done well. The placement is rather important, right after the Master Cylinder and before any metering or pressure holding devices.
Ground to a relay, try not to exceed 100mA on that draw.
Hope this helps.
Tru
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I'm a writer, feed the artist and buy a book.
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