How to open front lid - 987 - battery flat

[987 2.7]

I’ve tried the trick pulling out the positive terminal within the fuse box and clipping the negative to the exposed metal door hinge - and absolutely nothing, either from the key and the sill mounted switch. I’ve used a fully charged jump pack as well. 
The car has not been started for around 3 months and I left it unlocked to try and conserve the battery. I guess I should have left the front lid unlocked and removed the luggage light terminals. If only 🥴.

Any advise Chaps ??

Cheers in advance. Nick. 

[fewtrees]

I’ve had the same problem and connecting a battery or jump start kit didn’t work. Had to release manually so..  The manual cable release can be found in the wheel well of the nearside front wheel. I had to take the wheel off to do it. You have to give it a yank. Not sure if the plastic had to come off but the cable is towards the top and front.

I now leave it on a battery tender if I’m not expecting to use it for a few days..

[987 2.7]

2 hours ago, fewtrees said:

I’ve had the same problem and connecting a battery or jump start kit didn’t work. Had to release manually so..  The manual cable release can be found in the wheel well of the nearside front wheel. I had to take the wheel off to do it. You have to give it a yank. Not sure if the plastic had to come off but the cable is towards the top and front.

I now leave it on a battery tender if I’m not expecting to use it for a few days..

Many thanks for the advice. I guess the inner wheel arch liner is easy enough to remove ?….

[jasonmo]

STOP!

[jasonmo]

If you pull the fuse cover in the drivers footwell theres a little charge point - i think its top R of the fuse panel - if you have a battery booster - you touch the positive (I think) on the little copper plate and hit the bonet release - magic!

[jasonmo]

think its under that little red cover top Right

[Paul P]

Jump packs often don’t work with the fuse box connector.  They contain smarts to tell them when to deliver high current.  Usually that’s triggered by a high current demand (trying to start the car). Issue is the emergency opening mechanism doesn’t draw enough to trigger smarts and with out it the pack only delivers enough to charge a phone. 
 

you need either a pack with a “jfdi” button or an actual battery.  
 

 Connect up making sure you have a good earth (I have used door latch plate” and give it a couple of mins then try the frunk with the key remote button.  
 

that usually works.  
 

hind sight is a wonderful thing but yes.  Popping the frunk would have been a good idea.  The light turns off after 20 mins so if you forget to disconnect interior light then nonissue.  
 

if you can a better conditioner is idea. I use a ctek connected via the ciggy lighter.  5th year of using it and it seems to just work. Although I use mine occasionally over winter (every few weeks) and use the ctek when I know I am not using the car for a while   
 

One thing to beware off.  Porsche have a habit of forgetting options like heated seats and even disabling things like headlights and interior lights after a prolonged disconnected battery (or sitting with a totally flat battery for a while ).  They go into “transit mode” and need a handover reset with Porsche diags equipment to wake the forgotten or disabled features up. 

[987 2.7]

1 hour ago, Paul P said:

Jump packs often don’t work with the fuse box connector.  They contain smarts to tell them when to deliver high current.  Usually that’s triggered by a high current demand (trying to start the car). Issue is the emergency opening mechanism doesn’t draw enough to trigger smarts and with out it the pack only delivers enough to charge a phone. 
 

you need either a pack with a “jfdi” button or an actual battery.  
 

 Connect up making sure you have a good earth (I have used door latch plate” and give it a couple of mins then try the frunk with the key remote button.  
 

that usually works.  
 

hind sight is a wonderful thing but yes.  Popping the frunk would have been a good idea.  The light turns off after 20 mins so if you forget to disconnect interior light then nonissue.  
 

if you can a better conditioner is idea. I use a ctek connected via the ciggy lighter.  5th year of using it and it seems to just work. Although I use mine occasionally over winter (every few weeks) and use the ctek when I know I am not using the car for a while   
 

One thing to beware off.  Porsche have a habit of forgetting options like heated seats and even disabling things like headlights and interior lights after a prolonged disconnected battery (or sitting with a totally flat battery for a while ).  They go into “transit mode” and need a handover reset with Porsche diags equipment to wake the forgotten or disabled features up. 

That’s really useful Paul - many thanks 🙏🏻. I’ll give that a go with a decent battery instead…..Or perhaps jump from the wife’s RR. That got a fairly recent battery fitted. 
What do you think….jump from the car, or from a good remote battery ?

Cheers, Nick. 

[987 2.7]

1 hour ago, Paul P said:

Jump packs often don’t work with the fuse box connector.  They contain smarts to tell them when to deliver high current.  Usually that’s triggered by a high current demand (trying to start the car). Issue is the emergency opening mechanism doesn’t draw enough to trigger smarts and with out it the pack only delivers enough to charge a phone. 
 

you need either a pack with a “jfdi” button or an actual battery.  
 

 Connect up making sure you have a good earth (I have used door latch plate” and give it a couple of mins then try the frunk with the key remote button.  
 

that usually works.  
 

hind sight is a wonderful thing but yes.  Popping the frunk would have been a good idea.  The light turns off after 20 mins so if you forget to disconnect interior light then nonissue.  
 

if you can a better conditioner is idea. I use a ctek connected via the ciggy lighter.  5th year of using it and it seems to just work. Although I use mine occasionally over winter (every few weeks) and use the ctek when I know I am not using the car for a while   
 

One thing to beware off.  Porsche have a habit of forgetting options like heated seats and even disabling things like headlights and interior lights after a prolonged disconnected battery (or sitting with a totally flat battery for a while ).  They go into “transit mode” and need a handover reset with Porsche diags equipment to wake the forgotten or disabled features up. 

That’s really useful Paul - many thanks 🙏🏻. I’ll give that a go with a decent battery instead…..Or perhaps jump from the wife’s RR. That got a fairly recent battery fitted. 
What do you think….jump from the car, or from a good remote battery ?

Cheers, Nick. 

[Menoporsche]

I'd jump from the RR while it's running, Boxster batteries aren't small.

I'd have to give you more advice to make it 2p worth though.

[TROOPER88]

On 11/19/2022 at 3:55 PM, 987 2.7 said:

I’ve tried the trick pulling out the positive terminal within the fuse box and clipping the negative to the exposed metal door hinge - and absolutely nothing, either from the key and the sill mounted switch. I’ve used a fully charged jump pack as well. 
The car has not been started for around 3 months and I left it unlocked to try and conserve the battery. I guess I should have left the front lid unlocked and removed the luggage light terminals. If only 🥴.

Any advise Chaps ??

Cheers in advance. Nick. 

Where are you based Nick?

[987 2.7]

1 hour ago, TROOPER88 said:

Where are you based Nick?

Oxted, Surrey. 

[fewtrees]

23 hours ago, jasonmo said:

If you pull the fuse cover in the drivers footwell theres a little charge point - i think its top R of the fuse panel - if you have a battery booster - you touch the positive (I think) on the little copper plate and hit the bonet release - magic!

Yup, never worked for me I’m afraid 😧 

[TROOPER88]

28 minutes ago, 987 2.7 said:

Oxted, Surrey. 

I am based in Lower Sunbury, Surrey but a 986 specialist but do work on 987's.

 

If you get really stuck, give me a shout.

 

Paul 

[987 2.7]

7 minutes ago, TROOPER88 said:

I am based in Lower Sunbury, Surrey but a 986 specialist but do work on 987's.

 

If you get really stuck, give me a shout.

 

Paul 

Thanks Paul. I’ll connect some jump leads from RR ( running ) connecting the positive lead to the red block in the fuse panel and the neg to the door receptacle latch. 
Fingers crossed 🤞 
 

[Paul P]

Yes.  Positive to red connector. 
 

likely not a problem from a running car but personally I would be inclined to use a decent standalone battery of one was available 

[987 2.7]

Bingo !! Lid open and jumped it from the RR. All good EXCEPT a message saying PSM Failure is present and the red warning light on the temperature gauge is flashing. The temperature on the gauge is at a steady 80 and hasn’t gone beyond. 
All other electronics seem to be fine.

Any ideas Paul ??….

[987 2.7]

I’ve now had her running for around an hour, switched her off, but is dead again. I’ve now put it on charge and the unit indicates it is at least, charging.  
What would that flashing red light on the temp gauge indicate, baring in mind the actual running temp is steady at 80 ?

Cheers, Nick. 

[½cwt]

Low water level if the same as the 986.  PSM could be a duff ABS hub sensor, but driving could solve that

[987 2.7]

7 minutes ago, ½cwt said:

Low water level if the same as the 986.  PSM could be a duff ABS hub sensor, but driving could solve that

Water level is fine according to the reading in the rear compartment….

 

19 hours ago, Paul P said:

Yes.  Positive to red connector. 
 

likely not a problem from a running car but personally I would be inclined to use a decent standalone battery of one was available 

 

[iborguk]

17 minutes ago, ½cwt said:

Low water level if the same as the 986.  PSM could be a duff ABS hub sensor, but driving could solve that

PSM errors are normally thrown after a battery removal/flat battery. Just drive it a bit and that will disappear.

[Bike Loon]

23 minutes ago, 987 2.7 said:

I’ve now had her running for around an hour, switched her off, but is dead again. I’ve now put it on charge and the unit indicates it is at least, charging.  
What would that flashing red light on the temp gauge indicate, baring in mind the actual running temp is steady at 80 ?

Cheers, Nick. 

Sounds like your alternator is goosed.

[Paul P]

3 hours ago, Bike Loon said:

Sounds like your alternator is goosed.

^^ this ^^. 
 

You need a cheap multimeter.  Measure the voltage across the battery then get it running and measure again.  Should be around mid 12 not running and mid to high 13 when running.  (Someone will know the numbers more accurately). 
 

flashing temp gauge I think indicates a sensor fault but I would sort out the battery before worrying about other weirdness  

 

Psm error as others have said is expected on a dead/disconnected battery 

[sa utah]

Jump packs won't work as mentioned,    I have a CTeK MXS10 which has a 12v supply option.  That works great to put on the fuse box post.   

[Daveb975]

This is quite a timely thread for me as I've just bought a Noco jump pack and it sounds as though it won't do what I need.

My car sits in the garage on a CTEK charger most of the time, but I've noticed lately when away that even if it is off charge for a day or two, there is a noticeably lower starting power. It's always started, but doesn't feel like it should.

I bought the Noco as an option to charge quickly if it ever failed to start completely, but I forgot that this won't be any good if I can't get to the battery!

I'll keep it anyway as I suppose the battery could be too flat to start the car but not totally flat in some cases.

New battery ordered!