Electrics Anyone?

AlanS

Regular Member
British Zeds
Joined
Apr 2, 2020
Messages
12
Model of Z
3l Z4
Car electrics are a bit of a mystery to me so any help would be greatly appreciated! Indicators,hazards, brake lights, fogs and main beam are no longer working, but driving lights are and won't switch off. Thought it could be the light switch on the dash but why no indicators? Can only find wiring diagram for Z3 in resources (but probably the same?) Thanks in advance! :)
 

MarkPlant

Dedicated Member
Joined
Apr 21, 2019
Messages
74
Just have a look how old your battery is , the Z4 does suffer from very weird electrical issues if the battery is on its way out
 

AlanS

Regular Member
British Zeds
Joined
Apr 2, 2020
Messages
12
Model of Z
3l Z4
Hi Mark Its only a couple of years old and I did check the voltage - around 11.8 v even though its not been used for a while. I'll have a go at disconnecting the battery though :thumbsup:
 

t-tony

Zorg Expert (II)
Supporter
British Zeds
#ZedShed
Joined
Dec 31, 2013
Messages
39,847
Location
Torksey Lock,Lincoln, England
Model of Z
Z4 3.0 Auto
Have you checked for anything else not working? Such as heater fan, A/C, etc. When the battery gets very low it's possible for the car to go into "transport mode" which cuts out some systems. You need a code reader to deactivate the transport mode if that proves to be the problem.

Tony.
 

AlanS

Regular Member
British Zeds
Joined
Apr 2, 2020
Messages
12
Model of Z
3l Z4
Hi Tony thanks for the responseEverything else seems to be fine so yes code reader may be the way forward
 

Nodzed

Zorg Expert (I)
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British Zeds
M Power
#ZedShed
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Feb 18, 2016
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Location
Forest of Dean, Gloucestershire, England
Model of Z
Z3M and Z4 (e89)
Going by your description above possibly, the 'processor' has failed inside the 'Lights Module' if so you'll need to replace it.
The light module controls and monitors the vehicle lights. Information is received and sent via the data bus K-CAN SYSTEM.

Function defects with failure of the processor:
Working low beam, No turn indicators and hazard warning lights, no high beam, no headlight flasher, no fog lights, no rear fog light, no third brake light
No communication across the K-CAN SYSTEM.
 

AlanS

Regular Member
British Zeds
Joined
Apr 2, 2020
Messages
12
Model of Z
3l Z4
Going by your description above possibly, the 'processor' has failed inside the 'Lights Module' if so you'll need to replace it.
The light module controls and monitors the vehicle lights. Information is received and sent via the data bus K-CAN SYSTEM.

Function defects with failure of the processor:
Working low beam, No turn indicators and hazard warning lights, no high beam, no headlight flasher, no fog lights, no rear fog light, no third brake light
No communication across the K-CAN SYSTEM.
Going by your description above possibly, the 'processor' has failed inside the 'Lights Module' if so you'll need to replace it.
The light module controls and monitors the vehicle lights. Information is received and sent via the data bus K-CAN SYSTEM.

Function defects with failure of the processor:
Working low beam, No turn indicators and hazard warning lights, no high beam, no headlight flasher, no fog lights, no rear fog light, no third brake light
No communication across the K-CAN SYSTEM.
 

AlanS

Regular Member
British Zeds
Joined
Apr 2, 2020
Messages
12
Model of Z
3l Z4
Many thanks NodzedThose are all the faults I’m seeing so will give it a go and update the forum asap ( I’m self isolating so may take a few days) Stay safe and thanks again!
 
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