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Bulb defective light is on
- Thread starter Robert63
- Start date
What model of Z4? We need the year at a minimum.Robert63 said:
Check the codes.
Had one like that in a facelift and the codes said the rear led taillights had a high resistance. But they all worked? So using scanner 1.4 I coded out the checks of that light and the indicators started working properly again. No idea why though.
Had one like that in a facelift and the codes said the rear led taillights had a high resistance. But they all worked? So using scanner 1.4 I coded out the checks of that light and the indicators started working properly again. No idea why though.
Indicator relay flashing relies on a set resistance through the 'circuit' to flash at the required rate. If one or more bulbs in the circuit has a dodgy filament the resistance will change thus changing the flashing rate.
The bulb fault light is showing because the overall resistance in the circuit has changed, therefore it presumes a bulb is out.
Chances are one bulb will blow very soon as the resistance isn't right. You can either change all indicator bulbs on that circuit or wait for one to blow and just change that one.
If an LED has been used to replace a filament bulb, this can cause an issue (but not always. It depends on the LED resistance).
The bulb fault light is showing because the overall resistance in the circuit has changed, therefore it presumes a bulb is out.
Chances are one bulb will blow very soon as the resistance isn't right. You can either change all indicator bulbs on that circuit or wait for one to blow and just change that one.
If an LED has been used to replace a filament bulb, this can cause an issue (but not always. It depends on the LED resistance).
