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Wer bremst verliert
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Location: Toronto, Ontario
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1971 Dash warning light?
I feel silly asking this very basic question and apparently I'm the first one since I cant find it in SEARCH...
What is this warning light on the dash? Mine stays on. Also, oil pressure barely reads when idling but acts as expected under acceleration, load and cruising. 
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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10-11-2007, 01:52 AM
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Hi John
Its your handbrake warning light! Cheers mate!
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'74 RS 3.0 Replica Porsche 968 Clubsport SOLD '70 911E Bahia Red SOLD '71 911 S/T Replica 2.3 Twin plug BEAST  SOLD
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10-11-2007, 02:10 AM
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Must have a bad switch or short maybe. The brake is definately off. Thanks.
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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10-11-2007, 02:37 AM
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1-6-2-4-3-5-1-6-2-4-3-...
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Heh, I had the same two issues when I first got mine. My warning light was on only occasionally so I thought it had to do with the oil. It turns out that if the handbrake is up by only one notch, the light goes on.
My oil gauge also works like yours. Also, it goes up when the car gets warmer.
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'70 911E Coupe, Webers 40IDA |
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10-11-2007, 04:19 AM
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Not sure about a 73 but I believe the light also is tied into the master cylinder brake switch circuit. You may have a faulty switch or poor connection at the MC if the E brake switch checks out.
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L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip |
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10-11-2007, 04:33 AM
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John, that is the alternator warning lamp. The handbrake lamp is the TOP lamp which is also the brake warning lamp.
If it stays on continuously after startup, your battery is not charging. Search under my name for "blue wire" for a wealth of information about how to fix. The "G" means "Generator" in German which means. . . er. . . "Generator" in English. A holdover from 356/912 days!
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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10-11-2007, 05:47 AM
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1-6-2-4-3-5-1-6-2-4-3-...
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Absolutely right. The top one is the handbrake
 
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10-11-2007, 09:01 AM
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Hmmm. Perhaps I missed a wire when installing the new alternator. The battery is most definately charging...I've run the car for 1 hour for a time on joy rides with no problems and it starts without a problem.
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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10-11-2007, 12:52 PM
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Only way to tell is to measure the voltage at the battery.
It starts fine until it doesn't.
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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10-11-2007, 01:48 PM
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And the upper "hand brake" light will glow faintly if there is a problem in the m/c. Usually that's a grounding issue or a reset (on the side of the m/c) issue. But, if it come back on, there's a problem.
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10-11-2007, 02:03 PM
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John,
You mean check the voltage across the battery terminals (I get 12.57 all the time, new battery) or disconnect the ground to the battery while its running and check voltage or amperage across the ground strap to the battery neg terminal?
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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10-11-2007, 03:50 PM
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Whoops, sorry to lead you astray.......
 Not enough time in the car lately!
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'74 RS 3.0 Replica Porsche 968 Clubsport SOLD '70 911E Bahia Red SOLD '71 911 S/T Replica 2.3 Twin plug BEAST SOLD
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10-12-2007, 12:27 AM
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John,
Thou shalt not ever disconnect the battery whilst the engine runneth lest ye fry thine electrial system, forsooth. What I mean is, check the battery voltage with the engine running at the battery terminals. It should be at least 13.5v, if its 12.57, your alternator is not charging and the red light is a true indication that something is wrong. Which I believe it is.
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'66 911 #304065 Irischgruen ‘96 993 Carrera 2 Polarsilber '81 R65 Ex-'71 911 PCA C-Stock Club Racer #806 (Sold 5/15/13) Ex-'88 Carrera (Sold 3/29/02) Ex-'91 Carrera 2 Cabriolet (Sold 8/20/04) Ex-'89 944 Turbo S (Sold 8/21/20) |
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10-12-2007, 05:42 AM
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1970 Porsche 911E
