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Hello I'm new to this so appreciate any help.I have 996 Carrera 4 2002 model

when I lock the car all locks fine alarm sets no beeps but cluster mileage light does not go out it Remains lit all the time causing 

battery drain. Can anyone throw any light on this. I have tried numerous things. 

Thank you.  

Gavin. 

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:welcomeani:

 

Have you checked for water damage to the control unit under the left hand seat?

Look for corroded grounds and other signs of water damage.

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Another possibility is the ignition switch. Wiggle the switch with the key in it and see if it has any effect.

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Hi loren

thank you for your reply I have changed out the ignition switch but with no effect 

 will look under the seat in the morning and will let you know. 

Regards 

gavin. 

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Hi Loren I've checked for water ingress under passenger seat and its bone dry. 

I already put a new ignition switch electrical part on with no effect. The car alarm sets as it should with no beepsi

ive noticed a  relay under the same seat with the no 53 on it would you say because the alarm works ok that this relay 

would be ok too . Any help is appreciated. 

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Has the instrument cluster been removed?

If so, take it out again and check that all the connectors are snapped in and secure.

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Back to step 1.

If you close the car doors and lock the car the cluster should go off in 3-5 minutes. Long by most people's standards.

Does it do that?

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Exactly which ones stay on constantly?  Just the mileage?  Normally, like mine, get in car, insert key in ignition, turn key to position one (not start) and cluster lights up showing mileage, digital speed, outside air temp and oil level count down.  Does yours do that?  If you are actually getting that much battery drain I would find the fuse for the gauge cluster and pull it until the next time you drive the car and until you get this sorted.  I'm trying to figure out the logic of this but need more information.

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Mileage/ clock/ digital 0mph stay on constant when I have locked the car. I have it on a ctek all the time I'm not using it. 

When I enter the car the lights are already on( never went out) put in the key turn to position one oil countdown working fine and starts and runs absolutely fine. If I don't use the CTEK trickle charger it will not turn the engine over within 2-3 days. I've had new ignition switch new alternater I've even tried changing the cluster and that did not work either. 

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That function is controlled by the alarm/locking box and the cluster itself.

You will likely need a PST2 or PIWIS tester to do a diagnostic check on both - as well as checking for fault codes.

If you do not have access to one of those then you will likely need the assistance of a shop that one.

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Posted (edited)

What I think is something is keeping the cluster "awake".  I know you said there are no beeps when you lock the car.  Have you done any recent work on the door latch or window regulator?  Either side? I am thinking that maybe one of the door handle microswitches is faulty and the car does not know the door is closed thus causing the gauge cluster to stay on.  Do your windows work properly, dropping when you open the door?  Are you locking the car with the remote or with the key in door?  Perhaps another thing to try is leave the center console up (unlatched) and lock the car to see if your alarm horn actually works.  Upon locking you should get a beep indicating that a zone is open.

Edited by DBJoe996

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Hi joe thank you for your patience on this. 

Ive done no work on the car when this started to happen.  windows drop and rise when I open and shut the doors as they would but the passenger one doesn't drop as much as the drivers. It still happens if I lock the car with fob or key. Alarm seems to be functioning correctly lock once fob or key no beep... Lock twice horn beep once that is inside disabled. Leave console open it beeps, leave glove box open it beeps, I'm going to see if I can get hold of durametric Porsche scan tool to see what codes it throws up I too think it the alarm system somewhere not shutting the cluster down. 

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