Please Help lost battery charging

AerosGS

Junior Member
Messages
119
I'm stopped in Italy with an almost flat battery belt ok all systems seem to work except headlights. Is there a fuse or relay that controls charging
 

safrane

Member
Messages
16,747
A quick scan of the hand book and there is no ref for one.

Have you checked the terminals are all tight on the battery esp if you have been driving spirited?
 

safrane

Member
Messages
16,747
Benny had issues with the charging of his spyder some years ago which turned out to the the alternator.
 

conaero

Forum Owner
Messages
34,593
Indeed. The alternator diode pack died and was overcharging the battery. This caused the battery to get hot and expand, check the boot to see if this is the case but exercise extreme caution and cover your eyes.

If the diode pack is ok and the alternator is dying, the battery light will be on as sufficient charge (14v) will not be reaching the battery.

To confirm this, with the engine running put a multimeter across the battery terminals (don't rely on the gauge) and it should read over 14v, should be 14.5v ideally.

If all this seems fine, then check the terminals. I have seen them crack, can be remidied with a jubilee clip and also check the condition of the cables to the battery and the earth where it attaches to the body. For this, you will need to remove the right hand carpet trim round the battery.

And finally, just to rule it out, disconnect the battery for half an hour, then reconnect, remembering not to shut the boot and to drop the drivers window a little first.

Good luck, let us know how you get on.
 

conaero

Forum Owner
Messages
34,593
More info for you:

3731-e68652869198238f637122c5d7a51127.jpg

Might as well shove this in as well, whilst I am at it:

Main fuse panel, under passenger footwell mat...

A PANEL
F5-30A-Headlight washer timer
F44-30A-+30 Driver's seat
F45-30A-+30 Passenger's seat
F46-7,5A-Passenger's seat heating
F47-7,5A-Driver's seat heating
F50-7,5A-Air conditioning and ventilation unit
R8-30A-Connected devices cut out during ignition
R9-30A-Connected devices not cut out during ignition
R17-20A-Passenger's seat heating
R18-20A-Driver's seat heating

B PANEL
F9-10A-+87 main relay
F10-15A-+87 Lambda sensor main relay , air flow meter
F11-15A-+87 main relay for injectors, coils
F28-7,5A-A.C. Compressor
F29-15A-Horns
F51-10A-+15 ABS
R4-20A-A.C. Compressor
R5-20A-Immobilizer
R6-20A-Main injection
R10-20A-A.C. Compressor, horns

C PANEL
F13-30A-Starter motor
F32-10A-RH High beam light
F33-10A-LH High beam light, warning light
F34-15A-Fog lights
F35-15A-Left-hand low beam
F36-15A-Right-hand low beam, headlight washers inhibitor switch, manual headlight angle adjuster
R7-30A-Starter motor
R11-20A-Fog lights
R12-20A-High beam lights
R13-20A-Low beam lights

D PANEL
F6-10A-Headlight washer timer
F7-30A-Main injection
F8-7,5A-+30 injection
F12-15A-+30 ignition switch
F14-5A-Air conditioning and ventilation system, navigator cable bundle, (+15 connected devices cut out during ignition)
F15-15A-Cigarette lighter, radio, engine indic., rear view mirrors, ceiling light, glove compartment lamp (+15 cut out during ignition)
F17-25A-Windshield wiper, windshield wiper washing pumps, wiper(+15 cut out during ignition)
F18-10A-Airbag (+15 connected devices not cut out during ignition)
F19-5A-+15 NCS (+15 connected devices not cut out during ignition)
F20-7,5A-Immobilizer, CAN line interface, navigator cable bundle instrument(+15 not cut out during ignition)
F21-5A-Alarm system, preset for satellite alarm
F22-10A-Ceiling lights, ceiling light timer, (electronic) seats , luggage compartment and fuel flap opening controls
F23-7,5A-ECU for CAN line interface, OBD, Maserati CODE system, multifuncion display
F24-20A-Door locking system
F25-15A-Radio, navigator
F26-30A-Driver side power windows
F27-30A-Passenger side power window
F30-10A-+15 light switch, Cruise Control, headlight aiming ECU (+15 cut out during ignition)
F31-15A-Turn signal light blinking
F37-15A-+30 IGE ECU
F38-15A-+30 IGE ECU
F39-5A-IGE ECU, ceiling light timer, light switch (+15 connected devices not cut out during ignition)
F40-10A-Stop, clutch
F53-10A-Navigator, clock, tunnel display
F70-15A-Exhaust bypass solenoid valve
 

AerosGS

Junior Member
Messages
119
Well I got the alternator going by waggling the alternator connector -but there was never a charging light warning. The dipped headlights are not working now but the beep beep has stopped and the tail lights are off. At this point the local euro car rescue has carried us to a hotel and euro assist are supposed to be getting us a hire car at 9 am. Trouble is we cant take a hire car home so will have to fly back at our expense and get the car shipped home... ALL Maserati dealerships are apparently closed until September because of holidays so we can't get the car fixed in Italy! The annoying thing is that we could have got to a Maserati dealer in Ancona before they closed but they never answered the phone and the rescue truck would not take us there if they were closed...

Finally to add to the pain the rescue truck ramp was too steep and the car grounded at the rear.
 

FIFTY

Member
Messages
3,100
I have always wondered what Italy is like during August - most companies close for a 1-4 weeks and have compulsory leave for their staff.
 

outrun

Member
Messages
5,017
I'd try and track down a mobile auto electrician and see if they can fix it for you. Ask around local garages for a recommendation.
 

conaero

Forum Owner
Messages
34,593
Athols idea is a good one. How about just taking it to a regular garage, I am sure they can do something.

I have a good used alternator in the spares kit I can FedEx you over next day if your desperate....plus most other spares for a 4200.
 

TimR

Member
Messages
2,656
I’m a little confused by that diagram of the fuses under the floor. My interior lights have all stopped working, I’m hoping it’s a fuse. My floor fuse layout looks like this though....!!

According to the schematic and directions above, I want panel D. Easy I thought !! :oops:
 

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Navcorr

Member
Messages
3,839
81483

F22-10A-Ceiling lights, ceiling light timer, (electronic) seats , luggage compartment and fuel flap opening controls
 

TimR

Member
Messages
2,656
That’s a great help, thanks Neil...
Just realised the drivers seat (only) is refusing to move without the ignition on too....bizarre but in the same ball-park.
 

TimR

Member
Messages
2,656
Fixed my interior lights and seat with a fuse...
The glove box light has stopped working but this surely wouldn't cause a dash warning would it ?
Ive been adding LED to the interior lights..All was well. So I added reverse lamps, then and fog lamps...still no canbus warnings...
Then I added a bulb that wasnt CanBus rated in error ( stop/tail type) Immediately the ubiquitous CanBus warning. Thing is, I cant rid of it. Ive put everything back to standard...still there !
The glove box unit- should it have two permanent live 12v feeds ? All the functions there are ignition off right ..? Only one feed seems to be live. Fuel flap and boot function are perfect...bulb not so much. :oops:


Now what have I done...? :D