C

cooper2751

New Member
hi all
wondered if there is some one who can help. 06 freelander interior lights staying on even when doors are locked. no there problems I.e starts runs alrams fine no warning lights to say doors are open. and if its locked no warning tones from alarm. wireing diagram shows control wire comes from ccu and also does a terminal on the immobiliser coil transponder which again seems to be working fine. any thoughts ? thanks
 
cooper2751 said:
hi all
wondered if there is some one who can help. 06 freelander interior lights staying on even when doors are locked. no there problems I.e starts runs alrams fine no warning lights to say doors are open. and if its locked no warning tones from alarm. wireing diagram shows control wire comes from ccu and also does a terminal on the immobiliser coil transponder which again seems to be working fine. any thoughts ? thanks
Click to expand...

Door fell off in rain:D
 
Turn it off lol,
Presume its in the middle position to go off when locked? Bonnet switch? - just an idea not sure if its even wired to that but i know it beeps if open when u lock..
 
no middle sx. push button to overide but it is off. no beeping when locking so asuming door sxs are operating correctly. its the boot light as well. normal operation both come on when unlocked and fade out after a while or when car is locked. juststaying on. hence wondering is its any think to do with the ccu.

thanks
 
If the ccu thinks the doors are closed ( no horn pulse on locking) then the most likely cause is a failed transistor in the delay circuit. Does it have LED bulbs fitted? these can damage the transistors long term.
 
Maybe the switch has failed/stuck on? If itwas the relay wouldnt the ignition ring light 12v light etc be on 2?

Altho when you say staying on some (not sure about freebies mine doesnt) cars stay on for a short period before going off?
 
Nodge68 said:
If the ccu thinks the doors are closed ( no horn pulse on locking) then the most likely cause is a failed transistor in the delay circuit. Does it have LED bulbs fitted? these can damage the transistors long term.
Click to expand...


I had no idea LED's could cause damage. I have LED's all round inside my interior, as I need to be able to read at night for work and the std lights are too dim for my eyesight.
 
Epicuser said:
I had no idea LED's could cause damage. I have LED's all round inside my interior, as I need to be able to read at night for work and the std lights are too dim for my eyesight.
Click to expand...


Same here, I have leds all inside too
 
No issue with running LEDs, just once in a while chuck a halogen bulb in the circuit somewhere so it doesnt forget how to dim things. Ive had this before. Just put a halogen bulb back in and it should fix it, leave it in for a few days then back to LED>
 
Epicuser said:
I had no idea LED's could cause damage. I have LED's all round inside my interior, as I need to be able to read at night for work and the std lights are too dim for my eyesight.
Click to expand...

LED's can damage or shut down the dimmer transistors. This i believe this is due to the type of load an Led imposes on the transistors. A normal incandescent light bulb is a resistive load, it's resistance and therefore its current remains linear with the supply voltage. I.e as the voltage drops (dimming) the current also drops at the same rate.
An Led doesn't work this way although it's still essentially a resistive load. The difference between the two loads is very different. The Led imposes a non linear load on the transistors at varying voltages. When the Led first comes on there is often a peak in current. This occurs at a low voltage due to the"soft start" circuit built into many delay systems. There is a similar peak in current as the lights dim as the delay time ends. This can alter the current the transistors "see" outside of that it was designed to supply. I've seen this on a number of occasions on a variety of vehicles.
From playing about, I've found that leaving 1 normal bulb in place is enough to keep the transistors working as they should. I don't know why but it has worked with most systems I've tried it on.
 
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no led lamps any where all standard incandescent lamps. wire diagram also dont show relay or time delay all controled of the back of the ccu. also yes there is a light ring arounf the ignition key hole and this is also staying on when car is locked. (is that just a helpful light or is it somethink to do with the immobiliser? )
 
The light around the key is just to help when it's dark. Sounds like the transistors in the CCU have gone short to me, there is no relay, it's all electronic.
If you can remove the CCU, an electronics engineer should be able to change the transistors.
 
I have a 04 freelander and the center light stays on ? no doors open indicator , just when ever you but the bulb in it stays on, regular bulbs not led.
any ideas anyone ?
 
Nodge68 said:
LED's can damage or shut down the dimmer transistors. This i believe this is due to the type of load an Led imposes on the transistors. A normal incandescent light bulb is a resistive load, it's resistance and therefore its current remains linear with the supply voltage. I.e as the voltage drops (dimming) the current also drops at the same rate.
An Led doesn't work this way although it's still essentially a resistive load. The difference between the two loads is very different. The Led imposes a non linear load on the transistors at varying voltages. When the Led first comes on there is often a peak in current. This occurs at a low voltage due to the"soft start" circuit built into many delay systems. There is a similar peak in current as the lights dim as the delay time ends. This can alter the current the transistors "see" outside of that it was designed to supply. I've seen this on a number of occasions on a variety of vehicles.
From playing about, I've found that leaving 1 normal bulb in place is enough to keep the transistors working as they should. I don't know why but it has worked with most systems I've tried it on.
Click to expand...
Dimmer circuits are often load dependant, LED's draw only a fraction of the current of a tungsten fillament lamp, insufficient to allow the circuit to work as it should. They need a minimum load to operate correctly. Other than that, no way will LED's cause damage, the initial turn on load of an LED is far less than a cold tungstan filament and the current to voltage curve on the ones I have looked at is fairly linear.
LED's with ballast resistors are often needed to work correctly.
 
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