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Matt_3545

Member Since: 23 Sep 2024
Location: Stourbridge
Posts: 3

2007 Defender 110 Puma 2.4 USW Stornoway Grey

LED lights and buzzing relay

Hi all, I picked up a 2.4tdci 110 a month or so ago and have been working through a list of jobs that needed doing. One of these jobs was replacing the budget LED headlights that had failed with a full set of Wipac lights.

I've replaced the headlights, indicators, stop and reverse lights so far (not got around to the side repeaters and fog lights yet) and now when I use the indicators or hazards I get a buzzing sound whenever the indicators flash. This eventually settles down after about 30 minutes of driving around but I'd love to know how to stop the buzzing completely.

I have tried fitting both the supplied Wipac relay and the RDX relay from Bolt On Bits. Both have reduced the indicator flashing speed to the correct interval but both relays buzz.

Does anyone have an idea what the issue might be? I've looked across the forum and from what I understand, there shouldn't be any buzzing with a relay designed to work with LEDs.

2nd Nov 2024 3:25pm

custom90

Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20466

Try adding a temporary additional ground, prior to that you can try a continuity check on that pin.
LED’s (and associated components) are sensitive to grounding issues or voltage fluctuations, so the ground is a likely possibility that it has a high continuity reading and is common.
Also worth checking the rear grounds for the rear lighting loom on the transfer box.

2nd Nov 2024 5:47pm

Matt_3545

Member Since: 23 Sep 2024
Location: Stourbridge
Posts: 3

I'm not great with electrics so sorry for the daft questions. Is it just a case of checking that the earth connections are secure correctly?

Also, is it easy enough to add an additional earth? How would I go about it?

2nd Nov 2024 7:47pm

grahamb31

Member Since: 14 Nov 2024
Location: Bo’ness
Posts: 1

2014 Defender 90 Puma 2.2 SW Santorini Black

Hi, curious if you found a solution? I have the exact same problem. If I have heating hot it stops buzzing quicker.

14th Nov 2024 4:13pm

nosnibod

Member Since: 15 Aug 2007
Location: West Midlands
Posts: 370

1998 Defender 110 300 Tdi SW Bronze Green

When the indicators are buzzing, try switching the hazards on and off a few times to see if it changes. The indicator relay is fed through contacts on the hazard light switch that in my case caused extra resistance which was just enough to start the relay chattering (buzzing). If it changes the buzzing then the hazard light switch is the culprit.

I found that - temporarily - switching the hazards on and off again a few times cleaned the contacts. But a replacement switch solved the problem completely. Dave
Green Goddess - 1998 Defender 110 300tdi

14th Nov 2024 6:19pm

SuperDMan

Member Since: 17 Nov 2024
Location: Germany
Posts: 3

Also curios if you’ve found solution. I’m having the same issue!

17th Nov 2024 11:44am

Hedwig

Member Since: 20 Feb 2022
Location: Midlands
Posts: 40

Recently swapped all indicators to LED and had a buzzing noise on the relay. Bizarrely this was only the case when the engine was running, if done on ignition it was the normal tick noise. Referred this back to the supplier of the lights kit, Wipac sent a new relay and the problem was resolved.

18th Nov 2024 12:20pm

Matt_3545

Member Since: 23 Sep 2024
Location: Stourbridge
Posts: 3

SuperDMan wrote:
Also curios if you’ve found solution. I’m having the same issue!

Hi mate, sorry I thought I'd replied to this but it obviously didn't get sent for some reason. Hopefully you've fixed your indicator flashing issue but if not then this is what I did.

In the end I got rid of the wipac/Bolt on Bits flasher relays and put the OEM one back in then fitted resistors to each of the indicators, which has fixed the problem.

This is the link to the resistors I used:

https://www.ebay.co.uk/itm/384097170883?mk...media=COPY

30th Dec 2024 8:14am

jbcollier

Member Since: 29 Apr 2024
Location: Edmonton AB
Posts: 120

2009 Defender 110 Puma 2.4 SW Alpine White

If you fit LED turn signals then you need to fit an LED flasher relay.

1st Jan 2025 5:47pm

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