Member Since: 21 Aug 2012
Location: In a box
Posts: 67
alternator keeps stopping charging
ill try and explain got a cig-plugin 12v meter run the engine and it shows 14.1v switch everything on and it drops to 13v rev the engine and it goes back up to 14.1v.
after about 30mins of driving the volts will drop like its not charging then all lights on dash special programs off and lower suspension indicators flashing.
stop the car read the codes and nearly all saying loss communication
clear the codes then drive for a while and it happens again been like this for a week.
brought a new alternator, new battery, brake switch and change the brake lights and still the same.
now when I switch on its going mad flashing not starting and when I connect the iid tool is says ready but wont do anything else so I can't read the codes.
tried a hard reset and charging the battery on a charger still can't read the codes .
anyone have any ideas what to try next?
cheers
18th Jun 2016 6:09 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Check charging circuit fuse and the battery ground cable, including at the chassis end.
Forget about the fault codes as the doctor is ill.
Remember to check that the outside air temp is valid.
Also check the PCM (behind battery, in a plastic box) for corrosion around the pins.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 10 May 2013
Location: surrey
Posts: 15
Check the main battery earth is not sheared off behind the alternator where it bolts to the block
18th Jun 2016 6:21 pm
Nightrider
Member Since: 21 Aug 2012
Location: In a box
Posts: 67
thanks for replying
where do you mean chassis end the battery to earth is ok and I've checked all fuses in the fuse box next to the battery.
18th Jun 2016 6:21 pm
Nightrider
Member Since: 21 Aug 2012
Location: In a box
Posts: 67
jonathan.day wrote:
Check the main battery earth is not sheared off behind the alternator where it bolts to the block
cheers will have a look at this
18th Jun 2016 6:22 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Also confirm the voltage reported from the PCM (IID live data) roughly matches your real-world voltage meter.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 21 Aug 2012
Location: In a box
Posts: 67
Reading up on this site about can bus issues if I bang on the top dash above instrument cluster it clear the faults bang again and flashing lights so I'm about to take the cluster out.
Is the anything I should look at for when removing it?
21st Jun 2016 10:34 am
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20837
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