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drrnsk8ter4
Samba Member
Joined: December 14, 2004
Posts: 340
Location: simi valley, ca
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 Posted: Sun Aug 07, 2005 12:31 am Post subject: brake light comes on randomly |
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i have a 74 std with a newly installed master cylinder that has a solid brake pedal but usually when i start my car the brake light comes on and then as i drive along (brakes work great) the light eventually just turns off...what would be the cause of this???
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(O\U|U/O)--->74 std bug... |
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Miguel Arroyo
Samba Member
Joined: April 02, 2004
Posts: 3122
Location: Miami Beach, Florida
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| Posted: Sun Aug 07, 2005 5:37 am Post subject: |
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| Have you verified the electrical connections are cleaned. Is there air entraped? |
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Todd Wilson
Samba Member
Joined: August 07, 2005
Posts: 3
Location: Western Arkansas
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| Posted: Wed Aug 31, 2005 9:58 pm Post subject: Troublesome Brake Switch. |
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| This sounds like a similar poblem I am having with a rail, I am using disc brakes on the rear only and just changed out the master cyclinder. But my brake lights are staying on all the time after I hit the brakes one time. I am guessing that I am building too much presure in the lines and there is no where for it to go. As I said this is a new master cyclinder that was designed to use the 2 wire brake light switch. This may be what could be causing your problem as well. I have let just a little air in the line to test my theory and the brake light switch now works properly most of the time however, I do not recomment you let air into the system as this could cause a lockup or worse the could cause the cyclinder to bottom out and loose all braking. The other solution I can think of is to move the switch to the "T" at the back of the car since the bias would be less there that could also solve the problem. :shock: |
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DrDarby
Samba Member
Joined: May 12, 2004
Posts: 6543
Location: Northern Illinois
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| Posted: Thu Sep 01, 2005 10:44 am Post subject: |
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What about the handbrake warning light ? The switch is under the hand brake lever.
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Midwest Autosavers, Inc. Crystal Lake, IL |
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Todd Wilson
Samba Member
Joined: August 07, 2005
Posts: 3
Location: Western Arkansas
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| Posted: Fri Sep 02, 2005 10:26 pm Post subject: Possible Solution to lighting problem |
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Most aftermarket master cyclinders have and adjustment for the pistion I was working on my rail tonight and it just dawned on me I had forgotten about the piston adjustment screw in the back of the master cyclinder. If you remove the brake light switch and turn the adjustment screw clock wise this should reduce some of the pressure on the brakelight switch and allow for normal braking. After I had made this adjustment the lights work perfectly as did the brakes. Hope this helps  |
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