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phillips321



Member Since: 16 Dec 2021
Location: UK
Posts: 103
2005 Defender 110 2.5 TD DCPU Belize Green
TD5 interiors lights fuse keeps blowing
Hi all,

My TD5 has a roof console with two lights and a USB charger. Recently the 10A fuse keeps blowing (also taking out radio) and I’m struggling to trace the issue.

I believe the roof wiring has the following:
Permanent live
Permanent ground
Switched ground

With the two interior lights and the USB charger unplugged the fuse doesn’t blow.

However, when reconnected it blows.

I’m trying to figure out if it’s blowing due to the switched ground or permanent ground. Any easy way to do this?

Thanks in advance.
Post #955860 18th Jun 2022 6:23pm
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phillips321



Member Since: 16 Dec 2021
Location: UK
Posts: 103
2005 Defender 110 2.5 TD DCPU Belize Green
I’m starting to think that the heat over the last few days has caused this.
I’ve taken the roof console down and have insulated all the wiring and the back plates of the interior lights in case they were grounding out on something 🤷‍♂️

If anyone has any ideas?



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Post #955887 18th Jun 2022 9:01pm
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phillips321



Member Since: 16 Dec 2021
Location: UK
Posts: 103
2005 Defender 110 2.5 TD DCPU Belize Green
Am also thinking two old school bulbs and a USB charger is drawing too much current? But surely not 10a???
Post #955888 18th Jun 2022 9:07pm
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Balvaig



Member Since: 19 Feb 2016
Location: Fife
Posts: 732
Scotland 2016 Defender 90 Puma 2.2 Landmark LE Corris Grey
Work through the problem step by step.

Does the fuse blow the moment you reconnect the console? If so the usb module may be faulty or you have a short in the console.
Check out the console with a multimeter .

Does the fuse blow only when the lights come on?
Does the fuse only blow when you plug something into the USB port?
This may identify the bit of the console with a fault.

Try to find the power draw from the console from manufacturers web site. This will let you check the suitability of the fused circuit.

Electrical problems are frustrating, you just have to work through and test.
Post #955904 19th Jun 2022 7:30am
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Penfold_6290



Member Since: 22 Sep 2021
Location: Dorset
Posts: 320
United Kingdom 2002 Defender 110 Td5 CSW Epsom Green
Check all the wiring in the A pillar very carefully. It is easy to pinch a wire when reattaching the trim piece and cause a short, hence the fuse blowing...ask me how I know!
Post #956077 21st Jun 2022 7:18am
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