Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Consumer Rights Act
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Official Porsche Centre Reviews
Model
Stock
Porsche 911
992 : 2019- 0
991 : 2011- 23
997 : 2004- 63
996 : 1997-2005 31
993 : 1993-1998 2
964 : 1989-1993 0
Carrera 3.2 : 1983-1989 2
Carrera SC : 1977-1983 3
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 1
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 25
Cayman : 2005- 21
Cayenne : 2003- 7
Macan : 2014- 4
Panamera : 2009- 0
912-914-924-928-944-968 0
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [992] 2018-Current
Porsche 911 [992]
911 [991] 2011-2019
Porsche 911 [991]
911 [997] 2004-2012
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message
Winklep
Newbie


Joined: 23 Dec 2011
Posts: 44
Location: Beckenham


PostPosted: Fri Jan 17, 2020 5:45 pm    Post subject: Big mistake reversed battery Reply with quote

I know it should be beyond any idiot but I managed to fit a new battery in reverse, realised mistake and re fitted now the issues car won't turn over, multiple failure warning light and oil level failure light now showing , radio also not working.
Any ideas what I have destroyed in my error I'm a guessing the ecu but hoping not the case.

I am in south east London if any one has any recommendation re where I should go

Windows lights and wipers all seem to be working check radio fuse and ok but I believe there is another fuse on the reverse
_________________
2003 996.2 Targa tiptonic S
Polar silver
BMW 330 CS
Saab 900 convertable
Alfa Romeo Spider
 
  
View user's profile Send private message
   
dt4
Monza


Joined: 16 Mar 2016
Posts: 214
Location: Leeds


PostPosted: Fri Jan 17, 2020 6:31 pm    Post subject: Re: Big mistake reversed battery Reply with quote

Winklep wrote:
I know it should be beyond any idiot but I managed to fit a new battery in reverse, realised mistake and re fitted now the issues car won't turn over, multiple failure warning light and oil level failure light now showing , radio also not working.
Any ideas what I have destroyed in my error I'm a guessing the ecu but hoping not the case.

I am in south east London if any one has any recommendation re where I should go

Windows lights and wipers all seem to be working check radio fuse and ok but I believe there is another fuse on the reverse


I did it on my 914 last weekend, I have fried the alternator for sure, dont know what else yet
On a 1975 car I dont have a lot of electronics in comparison to you
_________________
1999 996 3.4 C4
1975 914 1.8
2000 986 2.7
 
  
View user's profile Send private message
   
Stotty
Monza


Joined: 17 Dec 2009
Posts: 172
Location: Surrey


PostPosted: Fri Jan 17, 2020 6:35 pm    Post subject: Reply with quote

Did it my Alfa 156 15 years ago when jump starting it. Needed a new ecu.
_________________
2000 996, C2, manual, arctic/metropole, Koni shocks, H&R -30 springs, H&R ARB's, Rennline SS engine mounts, cup wheel, 170k miles. 2018 Touareg RLine Plus
 
  
View user's profile Send private message
   
Windy101
Spa-Francorchamps


Joined: 05 Jun 2015
Posts: 306



PostPosted: Fri Jan 17, 2020 6:49 pm    Post subject: Reply with quote

Fried ecu would be my fear
 
  
View user's profile Send private message
   
Stotty
Monza


Joined: 17 Dec 2009
Posts: 172
Location: Surrey


PostPosted: Fri Jan 17, 2020 7:20 pm    Post subject: Reply with quote

I was lucky. Mine was a company car and I denied all knowledge of how it had happened.

I think a new ecu was around £800 at the time.

I guess you’d get one for a 996 much cheaper 2nd hand.
_________________
2000 996, C2, manual, arctic/metropole, Koni shocks, H&R -30 springs, H&R ARB's, Rennline SS engine mounts, cup wheel, 170k miles. 2018 Touareg RLine Plus
 
  
View user's profile Send private message
   
ragpicker
Reims


Joined: 14 Apr 2013
Posts: 4058
Location: North East England


PostPosted: Fri Jan 17, 2020 7:23 pm    Post subject: Reply with quote

Needed a new ECU in my boxster a few months ago.

In order for it to be plug and play you'll need to buy the ECU, immobiliser and key as a set. Swap them all out and you're good to go.

Think I paid about £300 off eBay from memory.

Thumb
_________________
986 S - usually in pieces: http://911uk.com/viewtopic.php?t=112626
955 Cayenne Turbo - a work in progress: http://911uk.com/viewtopic.php?t=131286&highlight=
 
  
View user's profile Send private message
   
deMort
Dijon


Joined: 21 Mar 2015
Posts: 7806
Location: Brighton


PostPosted: Fri Jan 17, 2020 8:11 pm    Post subject: Reply with quote

First off can i just say this is actually an easy mistake to make .. both leads are black and a LHD and the battery is reversed .. the instructions in the old original manual actually had the LHD instructions !

What's damaged though .. i'm afraid it varies .. there is no set combination of control units .. alarm module is usually the first .. possibly the alternator .. radio / pcm and usually just a fuse blows .

Dme is possible but i've seen these without a Dme failure .

First point of call .. a fault code read out to see which control units are communicating and which are not .. then its a case of fuse checking .. you can do this yourself if you wish ..

just pull and look at the fuses .. that will give you an idea at least.

if you have any type of code reader i can help diy to a degree .

I'm sorry to say i've fixed one or two of these over the years and cost wise .. i would Hazard a guess at £2K .. but its unpredictable i'm afraid so that's a guess on my part .

If it was a 997 then far higher .. last one i repaired was 6 control units fried and something like £4K .

Any Porsche garage will be able to fix your car .. if you wish i can give you details of mine but to be honest i don't consider myself to be any different from any other garage and as we are approx 40 miles from you then a local garage will do just fine .. needs to be a Porsche Indy though .

EDIT ..

Second hand ECU and you need the alarm control unit and a key fob along with the donner car details .. chassis number etc .. ebay sometimes have these listed as a kit ... no chassis number of the donner kit and you can never code a new key fob on .
_________________
.
My Daughter's Crowdfunding has hit the target .

Thank you all so Very much .

She's not going until july 2020 though .



Mechanic

7pm - 9pm

Indy Mechanic .
 
  
View user's profile Send private message
   
dukeofnorthumberland
Newbie


Joined: 06 Oct 2018
Posts: 2
Location: Newcastle upon Tyne


PostPosted: Fri Jan 17, 2020 9:26 pm    Post subject: Reply with quote

I did exactly the same a few years back when fitting a new battery to my 996 in a poorly lit garage. It’s easily done! I fried the alternator and the awful Xtrons head unit my car came fitted with. Alternator cost £20.00 for a repair at a local electrical specialist and the head unit went where it belonged... in the wheelie bin. I’ve since wrapped the positive lead in red electrical tape to prevent future errors. I hope you get off as lightly as I did! 😊
 
  
View user's profile Send private message
   
Porkaholic
Spa-Francorchamps


Joined: 11 Jan 2009
Posts: 313
Location: Cornwall

2009 Porsche 997 Carrera 4S

PostPosted: Fri Jan 17, 2020 9:46 pm    Post subject: Reply with quote

Priority job tomorrow find some ‘red tape’!
_________________
2009 997.2 4S manual cab, light mods
2017 Cayenne S
2015 Mini
Volvo 460 GLT (Rally toy, 'The Meatball')
 
  
View user's profile Send private message
   
Robertb
Dijon


Joined: 01 Sep 2003
Posts: 7559
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Sat Jan 18, 2020 12:25 am    Post subject: Reply with quote

Yup, easily done by anyone. I hope it’s a relatively simple solution for you.
_________________
"911- the guilt-free supercar"

Current: 2003 C4S Coupe, seal/black

Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
 
  
View user's profile Send private message Send e-mail
   
Winklep
Newbie


Joined: 23 Dec 2011
Posts: 44
Location: Beckenham


PostPosted: Sat Jan 18, 2020 8:28 am    Post subject: Reply with quote

Thanks everyone for the response don't feel such a dumb ass now and will be using the red tape idea in the future.

DeMort thanks for the more technical response I have contacted my local indi (Beckenham) to see what they think, As you say the south coast is a bit of a slap otherwise you would be where I go, I may come back to you in the future though as anyone who can be so generous with help and advice deserves my business.
_________________
2003 996.2 Targa tiptonic S
Polar silver
BMW 330 CS
Saab 900 convertable
Alfa Romeo Spider
 
  
View user's profile Send private message
   
C4Silver
Spa-Francorchamps


Joined: 14 Aug 2019
Posts: 337
Location: Yorkshire


PostPosted: Sat Jan 18, 2020 9:10 am    Post subject: Reply with quote

Porkaholic wrote:
Priority job tomorrow find some ‘red tape’!


Definitely Doing this because there’s no way I’ll remember reading this until this happens to me !
 
  
View user's profile Send private message
   
TV8
Silverstone


Joined: 08 Nov 2019
Posts: 108
Location: Bromley


PostPosted: Sat Jan 18, 2020 9:50 am    Post subject: Reply with quote

I have a code reader and live close to you in Hayes if
You want to check what is going on?
_________________
2000 996 Coupe
 
  
View user's profile Send private message
   
Winny911
Montreal


Joined: 13 Dec 2012
Posts: 596



PostPosted: Sat Jan 18, 2020 11:18 am    Post subject: Reply with quote

I could never understand why the OEM battery people don't make life easy by using a round pole for positive and a square pole for negative that way you would have to be really forceful to wire it up wrong
 
  
View user's profile Send private message
   
jl-c
Spa-Francorchamps


Joined: 22 Jul 2013
Posts: 276
Location: Shropshire


PostPosted: Sat Jan 18, 2020 11:33 am    Post subject: Anti Corrosion Washers Reply with quote

I keep these in stock and when I buy a new battery, fit them. Along with sleeving the +ve cable ( or indeed red tape! ) then you have to be particularly distracted to fit it incorrectly! Totally agree that posts should be round and square and why do manufacturers put a tiny moulded + or _ on the case? Make them big and preferably coloured so we can see them

https://www.ebay.co.uk/itm/Car-Auto-Battery-Anti-Corrosion-Fiber-Washers-Acid-Chemical-Terminal-Protectors/124028819935?hash=item1ce0b199df:g:Fp4AAOSw0VZdQxTB
_________________
Porsche Carrera 2S 2005 black fully Hartech'd!, BMW Z4 coupé 2007 blue, Mazda Eunos 1996 yellow, VW Passat 2014 black.


We all do silly things/make mistakes, it's how we deal with them that sets us apart from animals and Americans.
 



washers.jpeg
 Description:
 Filesize:  27.16 KB
 Viewed:  824 Time(s)

washers.jpeg


  
View user's profile Send private message
   
Porkaholic
Spa-Francorchamps


Joined: 11 Jan 2009
Posts: 313
Location: Cornwall

2009 Porsche 997 Carrera 4S

PostPosted: Sat Jan 18, 2020 12:08 pm    Post subject: Reply with quote

I actually remembered to do it, thanks for the warning!
_________________
2009 997.2 4S manual cab, light mods
2017 Cayenne S
2015 Mini
Volvo 460 GLT (Rally toy, 'The Meatball')
 



42A63023-CDBA-435E-94C5-8EB18D3AFCD1.jpeg
 Description:
 Filesize:  1.45 MB
 Viewed:  808 Time(s)

42A63023-CDBA-435E-94C5-8EB18D3AFCD1.jpeg


  
View user's profile Send private message
   
Winklep
Newbie


Joined: 23 Dec 2011
Posts: 44
Location: Beckenham


PostPosted: Sun Jan 19, 2020 7:15 am    Post subject: Reply with quote

TV8 thanks for offering the use of the code reader, unfortunately I am stuck in the office the entire weekend (trying to get some funds in) and the car is going to the Indie on Tuesday so I do not think I would have an opportunity to take make use of it.

I will post an update later in the week when all the issues become clear.
_________________
2003 996.2 Targa tiptonic S
Polar silver
BMW 330 CS
Saab 900 convertable
Alfa Romeo Spider
 
  
View user's profile Send private message
   
TV8
Silverstone


Joined: 08 Nov 2019
Posts: 108
Location: Bromley


PostPosted: Sun Jan 19, 2020 9:54 pm    Post subject: Reply with quote

Hi Winklep, you mention a local independent in Beckenham - I wasn't aware of one but have found two - Westons and JJ Engineering. Keen to have some feedback on who you have used locally if you don't mind please? Happy to take this off the forum via PM or even phone call if you have the time?
_________________
2000 996 Coupe
 
  
View user's profile Send private message
   
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 12 Hours
Page 1 of 1

 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum