![]() | Home > Technical (L322) > Front LED Indicators in Headlights not working correctly |
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JMC Member Since: 01 Feb 2009 Location: Aberdeen-Angus Posts: 774 ![]() ![]() ![]() |
https://www.fullfatrr.com/forum/topic66925.html The older I get, the more I realise that people confuse wrinkles for wisdom |
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2555 ![]() ![]() ![]() |
The supply to the parker LEDs for both headlamps is PWM from a single wire from the BCM, with a solder joint for the split, then through a connector for each side (C2411/C2412 for LHS) nearly 2m of wire back from the headlamp connector. I suspect a poor connection at connector pair C2411/C2412 due to moisture and only a very small current ever passing through those terminals. Most of the wires at the headlamp connector pass through the connector pair so it might not be too difficult to find the connectors, although a connector location diagram would be very useful.
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Giffer2018 Member Since: 25 May 2020 Location: West Yorkshire Posts: 60 ![]() ![]() ![]() |
Thanks JMC for the interesting info. Problem is it’s the indicator so I cannot use a temporary supply like you.
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2555 ![]() ![]() ![]() |
Pin 3 of the headlamp connector should have full 12V on and off at blinker speed. It powers a LED module inside the assembly. There isn't a fuse as it is switched on and off by a transistor (FET) in the central junction box. |
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Giffer2018 Member Since: 25 May 2020 Location: West Yorkshire Posts: 60 ![]() ![]() ![]() |
GraemeS thanks for info. I will check when weather improves from -8C.
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2555 ![]() ![]() ![]() |
The side repeaters are powered by their respective door modules, which seems very strange but it goes a long way towards explaining why my LED repeaters glow slightly after a door is opened until the vehicle goes back to sleep. Were side repeaters added as an after-thought, possibly not provided on the early L322s? |
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Giffer2018 Member Since: 25 May 2020 Location: West Yorkshire Posts: 60 ![]() ![]() ![]() |
GraemeS, found what I think is terminal 3 in the connector plug.
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GraemeS Member Since: 06 Mar 2015 Location: Wagga area Posts: 2555 ![]() ![]() ![]() |
Check the voltage at the same pin in the other headlight socket. It should be 12V, not 5V.
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Giffer2018 Member Since: 25 May 2020 Location: West Yorkshire Posts: 60 ![]() ![]() ![]() |
Having not had time to do any more investigating.
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