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Brake lights
My brakes lights all of sudden does not work. I know it's not the bulbs. Any thoughts?
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08-30-2009, 05:45 AM
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Registered
Join Date: Oct 2005
Location: Anywhere but there
Posts: 668
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What year car? I had a similar problem with my '86 and found that the problem was a short at the 3rd brake light; the insulation was cracked and the 2 wires were touching...simple fix AFTER I had taken the brake light assembly apart for no good reason other than to kill an afternoon...major PITA. Check the fuse first to see if that is blown. If not, it may be the brake light switch(es) (on the master cylinder, I think.
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08-30-2009, 06:22 AM
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Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
Posts: 5,238
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Quote:
Thanks, Gerry
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1986 911 Targa. Per Road and Track magazine: Only in L.A.: In the window of a bar in Hermosa Beach, California. "Happy Hour prices during all car chases." Last edited by 86 911 Targa; 08-30-2009 at 08:46 AM.. |
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08-30-2009, 07:08 AM
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Brake lights
I am sorry guys it is 1984 911 euro.
W |
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08-30-2009, 09:50 AM
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Registered
Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
Posts: 5,238
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I don't know mutch about the Euro wired cars.
However, on our '86 factory manual fuse #4, 8A (green/blue wire), is the feed for our brake light switch. From the switch, a black/yellow wire goes to both stoplight filaments in our rear tailights.  Using a multimeter: Check both sides of the appropriate fuse on your fuse panel. If not blown, try cleaning the fuse contact/replace the fuse. On an old car, fuses & contacts have a tendency to deteriorate. Next check the ground (brown wire) to grounding point on the inside (right side) of the engine compartement. This circuit is very basic. nothing more than a switch. If nothing has been modified or tampered with: My bet. The brake light switch. Good luck, Gerry
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1986 911 Targa. Per Road and Track magazine: Only in L.A.: In the window of a bar in Hermosa Beach, California. "Happy Hour prices during all car chases." |
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08-30-2009, 12:00 PM
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Wayah Road Warrior
Join Date: Jun 2002
Location: Greenville, SC
Posts: 1,536
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Apparently brake light switches are a weak point ... tendency to arc out ..... I will post a link in a bit .... Gotta go find it.
Brake Light Switch, Again? Do a search on posts by DRACO A5OG .... brake switches are his topic specialty. I ended up getting rear-ended in an 87 Targa due to failed BLS.  Rear-ended on Dragon practice run (w/Pics) Last edited by Shadetree930; 08-30-2009 at 01:10 PM.. |
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08-30-2009, 12:18 PM
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Registered
Join Date: Sep 2007
Location: Connecticut
Posts: 438
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Very common problem. It happened to me three weeks ago.
I replaced my brake switches and added an arc supressor. Total cost was around $55 and should last forever. Install took less than an hour. Read this: Brake Lights and this: No brake lights Get the arc supressor here (no affiliation, just a happy customer) or search "BLSAS" for more info: http://forums.rennlist.com/marketplace/showproduct.php/product/13/date/1240673640
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1987 911 Coupe, Diamond Blue Metallic 2006 Cayman S, Seal Gray 1983 911 Targa, Black: The Dirty 911 (GRM) |
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08-30-2009, 01:26 PM
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1984 Porsche 911 3.2 Euro
