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Registered
Join Date: Oct 2007
Location: Houston,Texas
Posts: 27
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generator light comes on during rev...
Ok so I started driving my 911 daily here in Texas since the weather has been really cool lately.I have a red generator light that comes on always when I get on the gas.During Idle the car seems fine and also during cruising speeds.When I am idling at a stop the red light is very dim and when I get on it the light turns on. I so far know its not my fan belt and I also tested the coil.The coil read fine during a cold and hot test.I also want to test my voltage regulator but don't know how really.Could it be the alternator even if it runs and starts fine?and how do I go about testing it?The battery is new by the way.What things do I need to check for a problem.If anyone knows a good diagnostic list...let me know!--thanks--
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------------------------------------------ uno  '89 BMW 325is-------'94 BMW Touring----(Daily Drivers)----1976 911 Carrera 3.0 signature edition (euro)---964 body 1976 912E ----------(Weekend Warriors) --1992 Volvo wagon--(SPARE transport) |
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10-23-2007, 04:28 AM
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Join Date: Oct 1999
Posts: 8,673
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Actually, it sounds like the fan belt could be slipping.
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10-23-2007, 08:21 AM
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sudo apt-get purge 930
Join Date: Jul 2006
Location: Brandon, FL
Posts: 4,838
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Quote:
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Mark 1979 930 Euro ***GONE AND DON'T MISS IT AT ALL*** "Worrying about depreciation on your car and keeping mileage down is like not ****ing your girlfriend so her next boyfriend finds her more appealing" --clutch-monkey |
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10-23-2007, 09:32 AM
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Registered
Join Date: Oct 2007
Location: Houston,Texas
Posts: 27
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so replace the fan belt? what tension needs to be set for the fan belt? When I feel the belt it feels real tight with no play at all and on my 912 it has some slack.
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------------------------------------------ uno '89 BMW 325is-------'94 BMW Touring----(Daily Drivers)----1976 911 Carrera 3.0 signature edition (euro)---964 body 1976 912E ----------(Weekend Warriors) --1992 Volvo wagon--(SPARE transport) |
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10-23-2007, 02:27 PM
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Registered
Join Date: Oct 2007
Location: Houston,Texas
Posts: 27
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still was wondering if anybody knew of a list of diagnostics to check for the light?
1) Voltage regulator 2) Coil 3) distributer 4)fan belt 4) alternator 5)? 6)? .....+ locations and details... I ordered my service book but Porsche in Houston is very very very slow with parts 
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------------------------------------------ uno '89 BMW 325is-------'94 BMW Touring----(Daily Drivers)----1976 911 Carrera 3.0 signature edition (euro)---964 body 1976 912E ----------(Weekend Warriors) --1992 Volvo wagon--(SPARE transport) |
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10-23-2007, 02:30 PM
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<insert witty title here>
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Testing things like the voltage regulator, coil and alternator are more complicated than switching out the fanbelt to see if that's the problem. I've been trying to hunt down some kind of coil, VR, CD box problem, so I've done some reading in this area, and some of it gets quite complex! Do a search here for these tests and you'll find lots to read. But really, just try swapping out the fanbelt first and see if that solves the problem - it only takes a few minutes. But make sure you understand the tensioning procedure with the shims first. If it's at the proper tension you should be able to deflect the belt a half-inch, if memory serves.
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Current: 1987 911 cabrio Past: 1972 911t 3.0, 1986 911, 1983 944, 1999 Boxster |
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10-23-2007, 02:35 PM
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1972 Porsche 911T 2.4
