Side light

Shepprice · Apr 11, 2024

I have a problem with my side light the light has not been working we have had a look we have put a meter on it and it is giving 12 volts out but when we put the bulb in the voltage drops can any one tell me what the problem could be thanks

andyfreelandy · Apr 11, 2024

High resistance wire on the supply or ground side. Most likely a corroded terminal or part that contacts the bulb.

Shepprice · Apr 11, 2024

andyfreelandy said:
High resistance wire on the supply or ground side. Most likely a corroded terminal or part that contacts the bulb.

Thanks for that will have a look into it

Nodge68 · Apr 12, 2024

Shepprice said:
I have a problem with my side light the light has not been working we have had a look we have put a meter on it and it is giving 12 volts out but when we put the bulb in the voltage drops can any one tell me what the problem could be thanks

Knowing what vehicle it is would be helpful, as there are differences across model types.

Shepprice · Apr 12, 2024

Sorry about that it is a Freelander 2 2010 automatic

Nodge68 · Apr 13, 2024

Shepprice said:
Sorry about that it is a Freelander 2 2010 automatic

Ok. So on that vehicle, the power is supplied by FETs. The LH and RH side lights have their own separate FETs, so if one side isn't working, it's either the FET has gone into current limiting mode, or has failed.
If a FET is in current limiting mode, you can try a hard reset, which means disconnecting the battery for 30 minutes or so. If you're lucky, the problem will go away. If not, then a diagnostic read will be needed to identify the issue.
The side light ground is shared with the indicator and main beam bulbs in the headlamp unit, so if those are unaffected, the ground is OK.

Shepprice · Apr 13, 2024

Nodge68 said:
Ok. So on that vehicle, the power is supplied by FETs. The LH and RH side lights have their own separate FETs, so if one side isn't working, it's either the FET has gone into current limiting mode, or has failed.
If a FET is in current limiting mode, you can try a hard reset, which means disconnecting the battery for 30 minutes or so. If you're lucky, the problem will go away. If not, then a diagnostic read will be needed to identify the issue.
The side light ground is shared with the indicator and main beam bulbs in the headlamp unit, so if those are unaffected, the ground is OK.

Thanks for that I will look into it I will get back in touch thanks

Shepprice · Apr 14, 2024

I had a look at that today and it is working perfect one happy man thanks for your advice hope you have a good day

andyfreelandy · Apr 14, 2024

Just to help others, what did you do ??

Shepprice · Apr 15, 2024

I was told to disconnect the battery completely for 30 minutes and it worked

Side light

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