cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
  
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Hi all I need some knowledge on reverse lights please
When I turn my lights on, the reverse light appears to be half lit. But when I put it in reverse it doesn’t go any brighter. Only one of the 2 bulb coils lights up.
Is this a clue to any kind of problem please?
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 15th Oct 2020 4:13 pm |
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Admirable
Member Since: 19 Jul 2015
Location: Fife
Posts: 1011
 
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I'm guessing you have the wrong type of bulb fitted? It's should be a single filament bulb, it sounds like you have a double filament bulb as used for stop and tail fittings.
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| 15th Oct 2020 4:24 pm |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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Reverse light doesn’t come on at all sorry. But it does illuminate when lights are turned on...
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| 15th Oct 2020 4:42 pm |
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aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
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Its possible you have a bad earth at the connector and the lights are earthing through the reverse light.
Get somebody to put there foot on the brakes with the side lights fog lights and hazards all on and see if it flashes like a Disco (no pun intended)
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| 15th Oct 2020 4:47 pm |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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Hi and thanks
There’s no light on the reverse when gear selected. Earth wires to left of boot are all secure and botled down!
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| 15th Oct 2020 5:25 pm |
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aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
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But do the brake lights flash when everthing else is on including the hazards. It could be something as simple as a corroded plug in the back of the lights.
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| 15th Oct 2020 5:29 pm |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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Hi no the brake lights don’t flash
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| 15th Oct 2020 5:30 pm |
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Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10360
 
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I notice he has a manual gearbox
maybe the XYZ thing needs calibration ? ?
do manuals show the gear under the speedo ?
is R shown ?
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| 15th Oct 2020 6:22 pm |
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Hardware
Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12697
 
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cmb2020 wrote:When I turn my lights on, the reverse light appears to be half lit.
I really don't see how this can be anything other than an earth fault somewhere.
water in, or previously in, the connection ?
wrong bulb fitted somewhere ? the dual element bulb "live" solder lumps thus making strange connections ?
maybe an wire that looks sound being broken inside the insulation ?
if you take the light unit out and try connecting to the battery (or any 12v supply) with a couple of bits of wire, can you replicate the behaviour ? .
Dean
====================================
2011 D4 XS - OBD port protection, RLD spare wheel protector, All LED interiors lights, Timed Climate enabled, iiD tool paired.
2011 D4 Landmark - Stolen from same dealer before I paid for it
2011 D4 GS - Stolen whilst at dealer  ... All LED interiors lights, DRLs, Spare Wheel protector.
1996 300Tdi - Eaten by tin worms
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| 15th Oct 2020 6:32 pm |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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I did have a dash camera connected to the wire. That was how I noticed it had stopped working.
However the bulb seems fine!
Connections seem fine.
I’ll see what my Autel AP diagnostic can tell me
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| 15th Oct 2020 7:01 pm |
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Admirable
Member Since: 19 Jul 2015
Location: Fife
Posts: 1011
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cmb2020 wrote:Only one of the 2 bulb coils lights up.
You need to change the double filament bulb for the single filament bulb before doing anything else. You can 'borrow' the fog lamp bulb from the near side to test it.
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| 15th Oct 2020 7:05 pm |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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Yes I’ve got a single filament for reverse
I’ll go back to it tomorrow day now and update. And have a quick diagnostic check later.
Thanks
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| 15th Oct 2020 7:06 pm |
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Admirable
Member Since: 19 Jul 2015
Location: Fife
Posts: 1011
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Just a thought, does the reverse lamp work on the opposite side from the one you're having issues with?
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| 15th Oct 2020 7:24 pm |
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cmb2020
Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150
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TBC in day tomorrow 🤔
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| 15th Oct 2020 7:27 pm |
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