I have traced the fault to the wiring somewhere between the lighting control switch (side, headlights fogs, etc) and the load (could be any number of 10 possible things - cluster, radio, switch pack cigarette lighter light, window switch etc. The wire (red-brown) that provides power to all illumination is ~12v out from the switch.
However...
When connected to the load (the dash, radio, assorted lights etc). the switch itself shuts off the circuit. No fuses blown. I have replaced the switch thinking this was the initial issue, but it is not the switch (for the record a known working switch was borrowed and still the issue persists).
Turning the switch off then back on (to side lights, headlights etc) power restored.
question is:
1) Does this indicate a short somewhere between the switch and any number of the possible outlets/lights
2) what's the best way to try and trace this?
3) Why does the switch turn off then reset like this?
26th Sep 2023 6:57 pm
Sidestick
Member Since: 22 Apr 2012
Location: Rome
Posts: 2288
From the wiring diagram it could be related to a bad earthing.
Try to check for some corrosion around the light switch panel earth point C2627
Click image to enlarge
- Easy-Lift suspension module 4.0
- GoodWinch 9500 lb
- Full underbody protections
- Tree/Rock sidebars
- Prospeed roofrack & ladder
- Compressor guard
- Raised Air Intake
- Driving lights (2+4)
- 50 mm Waffle boards
- Altox Heater control
- Overland Rooftop Tent
- Rear seats entertainment
- Front & Rear camera
- GVIF
- Removable tow bar
- Cubby box fridge
- BFG KO2 265/65R17
- iidTool BT
26th Sep 2023 7:57 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10392
I’d almost bypass the switch and dimmer inside with a small fuse
See if the fuse blows
26th Sep 2023 9:19 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18471
The dimmer can go faulty and cause this, did your replacement switch also include the dimmer?06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
26th Sep 2023 9:26 pm
philchan1974
Member Since: 18 Feb 2019
Location: BC
Posts: 9
Thanks I will check this.
With your resources there, do you happen to know where i can find this connector - C1167/c1165 ? I can't upload the screen shot, but it's page 64 of the wiring diagrams for the LR3.
.
26th Sep 2023 9:26 pm
philchan1974
Member Since: 18 Feb 2019
Location: BC
Posts: 9
Martin wrote:
The dimmer can go faulty and cause this, did your replacement switch also include the dimmer?
Yes - in fact i thought that might be the case and grabbed another known working one. It does the same, so I do not think it is the dimmer switch.
26th Sep 2023 9:27 pm
philchan1974
Member Since: 18 Feb 2019
Location: BC
Posts: 9
Pete K wrote:
I’d almost bypass the switch and dimmer inside with a small fuse
See if the fuse blows
The fuse itself isn't blowing... but the switch is limiting the output once on load. Turning it off resets this.
26th Sep 2023 9:29 pm
Sidestick
Member Since: 22 Apr 2012
Location: Rome
Posts: 2288
Click image to enlarge
- Easy-Lift suspension module 4.0
- GoodWinch 9500 lb
- Full underbody protections
- Tree/Rock sidebars
- Prospeed roofrack & ladder
- Compressor guard
- Raised Air Intake
- Driving lights (2+4)
- 50 mm Waffle boards
- Altox Heater control
- Overland Rooftop Tent
- Rear seats entertainment
- Front & Rear camera
- GVIF
- Removable tow bar
- Cubby box fridge
- BFG KO2 265/65R17
- iidTool BT
26th Sep 2023 9:37 pm
philchan1974
Member Since: 18 Feb 2019
Location: BC
Posts: 9
thank you.
26th Sep 2023 9:39 pm
philchan1974
Member Since: 18 Feb 2019
Location: BC
Posts: 9
Just wanted to close this out by noting that i solved the issue - with diagram help - thanks!
The bundle located on the passenger (right side) of the vehicle was located. It was a notorious part of the taped bundle area where water could possibly get to - although this connection was ok.
I managed to isolate the offending load, and remove it from the bundle. Soldered everything up and it all works...
Thanks for your assistance.
10th Oct 2023 5:28 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10392
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