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YOUR RESEARCH996 electrical problem - Page 1 - 911/Carrera GT - PistonHeads UK
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Reported cause
The issue was diagnosed to a faulty alternator regulator, came in at just over £300 incl labour (5 years ago) and has been fine ever since.
996 electrical problem - Page 1 - 911/Carrera GT - PistonHeads UK
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Leading evidence: 'diagnosed' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'diagnosed' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Run which is definitely not normal' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion · Original poster
Another point I’ve noticed is there is a buzzing sound from the battery area when it is running which is definitely not normal.
996 electrical problem - Page 1 - 911/Carrera GT - PistonHeads UK
Test health of the battery
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Suggestion
Do you have a battery tester that can also test the health of the battery?
996 electrical problem - Page 1 - 911/Carrera GT - PistonHeads UK
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7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
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My GT3 seems to have an electrical problem. Battery level seems normal based on voltmeter on dash. Been on CTEK charger which doesn’t show ant issue. But simply won;t start. It’s as if battery is flat. turn ignition & a click & thats it.
Put another battery charger on the battery & it shows as if flat. Starts perfectly off the charger, but stop it & it’s as if the battery is flat again. Another point I’ve noticed is there is a buzzing sound from the battery area when it is running which is definitely not normal.
Any thoughts or is it joist a dead battery. Battery is around 5yrs old & has mostly been kept on a ctek charger.
Mine’s not a GT3, but it does seem to eat batteries if it’s not used regularly. No idea why.
Given a diagnosis by an Indy will likely cost more than a new battery I’d just stick one in it and see if that cures the starting issues.
It displays the battery has a voltage but can't jump start? Sounds like it doesn't have enough CCA, then. I'd test it with a new battery. I was told that even a well-kept battery will give up over time. Do you have a battery tester that can also test the health of the battery?
Edit: can't remember which brand (Yuasa?) does a 5 year battery warranty, but it might be worthwhile getting that one and claiming on the warranty after 4 years if you're keeping the car for a few more years.
Mine was struggling to start recently and was diagnosed as a corroded/deteriorated cable from the battery to the starter. item 17 on this diagram
https://www.design911.co.uk/diagrams/d/41180/0
I had them replace the starter too while it was in the shop and it starts a lot perkier now
Hi Rob,
I had a similar problem with my 996 turbo a few years back. The car was garaged with a CTEK charger, which I noticed was boiling hot when I unplugged it. The battery drained to completely flat in a few minutes, so I assumed it was a problem with the battery itself. Bought a replacement battery and exactly the same thing happened again.
The issue was diagnosed to a faulty alternator regulator, came in at just over £300 incl labour (5 years ago) and has been fine ever since.
Hope it’s an easy fix for you !
