 | Home > Puma (Tdci) > LED interior lights continually glow - why ?? |
 
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| IanM Member Since: 02 Jul 2014 Location: Herts Posts: 47  
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I'll join the "slight glow" club - ive left if for 2/3 days and the light still has a slight glow, I don't understand electrics (240 volts hurts, that's my knowledge) but the drain on the battery must be very small, init??
So anyone know how long (assuming good battery condition) it's safe to leave? Urban truck defender 90 R1200GS (for crossing continents) |
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1st Jan 2015 4:34pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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seems to be more of a problem with the later ones
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1st Jan 2015 4:39pm |
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NO,, Still 19th century bulbs !!
| durham Member Since: 02 Jun 2014 Location: Essex Posts: 40 
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Just to add to the pot, on my 2014 MY (cheap) replacement LED bulbs glow very slightly when all doors closed and as described by OP, only way to prevent is to switch light fitting to "off". They fade as normal, when door closed, but remain with a faint glow, even when driving. In my head I put it down to the drain being detected was so minimal it wasn't enough to show up on the OE ancient filament bulbs but was on modern sensitive LED. With the same "logic" I also decided it wasn't enough of a drain to lower the battery power, didnt use it for 10 days over xmas and started up no problem. Mine is in for warranty work next week (defender stuff, doors not closing properly etc.) and was trying to work out how to mention it as not OE bulbs, if I put the old bulbs back in, then of course there's no problem, which sort of provides LR with an answer.
The plus side is that the difference between old and new bulbs is phenomenal! |
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2nd Jan 2015 3:18pm |
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| Iktank Member Since: 08 Nov 2014 Location: Porthcawl Posts: 237  
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Mine is in with LR on 8th I will be putting my LED bulbs in to show them
Different bulbs will not affect warranty so I will inquire - the light should not do this whether LED or filiment bulb, if a switch is off it is off so fault somewhere Good ole Defenders huh |
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2nd Jan 2015 3:48pm |
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971 
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It's not just in Defenders that you get lights doing this, I've seen it quite a few times in mains stuff too.
The scenarios are either that there's a light switch with a neon that's connected to turn on when the lights are off which creates enough leakage to make LEDs flicker or those PIR modules you get in toilets and stairwells which require a little bit of current flow to work which is enough to make the lights flicker dimly. It's nothing to worry about, but if you want to check just connect a multimeter in series with it to measure the current. |
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3rd Jan 2015 10:10am |
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| LRmud Member Since: 22 Oct 2014 Location: IV12 Highland Posts: 198  
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This glowing seems to be a very common theme.
Having just fitted el cheapo Chinese strip LED lights to the rear of my old 90, I found they had a constant glow when the (Carling Dash) switch was in the OFF position. I had also fitted some of the same lights to the front footwells and these did not glow at all - ever. All of these LED lights are controlled by switching the earth through the Carling switch, in parallel with the door switch. After a few beers last night it suddenly came to me that the reason for the glow (i.e. constant electrical path to earth) must be through the switch (even in the OFF position) because there is a diode (LED power indication) inside the Carling Switch. If the two wires are not connected correctly, the diode will allow current to pass to earth, thus the glowing LED. A simple swap of the two wires going to the switch resolved the issue. I realise this may not solve everyone's problematic LED lights but most switches are similarly designed. Its certainly solved mine. -------------------------------------------------------------------------------------------------- 1989 Defender 90 Toyota Aygo & Honda FR-V |
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31st Jan 2015 5:19pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443 
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Damn, just thinking along those lines as well, there could be an earth leakage at no end of points. Let's face it, all that LR builders are doing is running an earth wire to the door switches, an odd stray filament of wire or a scuff in the insulation as it it pulled taught is neither one thing or the other. You could try taking the wires to the door switches off to see if the lights stop glowing and try to trace the likely wire.
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31st Jan 2015 7:26pm |
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| Fifth Horseman Member Since: 08 Mar 2011 Location: Lanarkshire Posts: 323 
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Wonder if this is related to the later (non-Lucas manufactured) alarm units? |
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31st Jan 2015 7:41pm |
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| LRmud Member Since: 22 Oct 2014 Location: IV12 Highland Posts: 198
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JWL, what I described is not a fault or earth leakage but part of the switch design.
If the Interior LED Lamp wires are not connected to the switch correctly (polarity sensitive, if you like) then the LED (diode) inside the switch will allow a small (20mA) current to pass to earth, and your interior lamps will glow annoyingly. Carling have a diagram on their website showing how their LED indication lamps are connected. I guess all other switch manufacturers will be similar.  --------------------------------------------------------------------------------------------------
1989 Defender 90 Toyota Aygo & Honda FR-V |
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31st Jan 2015 8:01pm |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443
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Yes I know what you're saying, I just put it a little poorly on what I was thinking. On a basic set-up I was just thinking of the vagaries of the build quality of our fravourite motors as I have come across owners of older even pre alarmed Defenders that have had the glowing led problems which leads me to thinking of some slight earth leakage through some dodgy insulation or even a door switch that could be tracking a small current leak'
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31st Jan 2015 8:22pm |
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| LRmud Member Since: 22 Oct 2014 Location: IV12 Highland Posts: 198
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Totally understand what you're saying. Switching the earth (door switches etc) can cause a lot of problems and any dodgy wires create problems. --------------------------------------------------------------------------------------------------
1989 Defender 90 Toyota Aygo & Honda FR-V |
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31st Jan 2015 8:26pm |
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| Flyingfocrs Member Since: 12 Jan 2015 Location: Deepest darkest Aberdeenshire Posts: 155 
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Have come across this many times over the years.
It is referred to as ghosting. Because LEDs require so little current to power them the close proximity to a live wire can energise them slightly even with zero volts across the light terminals. Solution is to only use error free or canbus type bulbs or to put a resistor into the circuit beside the bulb. This forces the bulb to draw a higher current to operate. |
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1st Feb 2015 10:39am |
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| MarkM61 Member Since: 11 Dec 2014 Location: Brisbane Posts: 11  
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These symptoms probably mean moisture in one more of the door position switches, leaking some current through in the off position. Same ( more or less) leakage current would flow with incandescent bulbs, but they would not glow. |
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1st Feb 2015 1:16pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17450 
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I would put money on it being a characteristic of the AS10 and its internal circuitry, and the change in manufacturer. The door switches activate the AS10 which activates the lights, so a high impedance path to earth via a door switch is unlikely to have this effect. More likely that the pull-up voltage in the AS10 differs from battery voltage by a a small amount and this is enough to make the LEDs glow.
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1st Feb 2015 2:53pm |
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