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SuperDMan

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

LED Signal Flasher Relay Buzzing

Hello,

I have a 1999 TD5 with a flasher relay buzzing. I replaced all the exterior lights with B.O.B RDX LED lights. They came with a B.O.B Flasher relay. I also installed NAS reverse and fog lights. After install, everything was normal for about 2 months. I started getting a loud buzzing when I use my turn signal. It buzzes indicating both left and right.

First thing I did,checked fuses associated with lights and didn’t find any bad. I only checked the fuses under the dash. Maybe there’s a hidden one somewhere else?

I then tried swapping out relay with a WIPAC led flasher relay. Didn’t work.

I then disconnected every light one-by-one. Didn’t work. It buzzes with no lights connected.

One weird finding, it doesn’t make the sound when the engine gets to normal operating temp.

I’m stumped at this point…

17th Nov 2024 8:30am

nosnibod

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

1998 Defender 110 300 Tdi SW Bronze Green

Someone else was asking the exact-same question here https://www.defender2.net/forum/topic93933.html.

Try my suggestion about the hazard light switch. The contacts in them can cause problems. Dave
Green Goddess - 1998 Defender 110 300tdi

17th Nov 2024 9:37am

Balvaig

Member Since: 19 Feb 2016
Location: Fife
Posts: 732

2016 Defender 90 Puma 2.2 Landmark LE Corris Grey

May be a loose connection in the relay socket.
Check that the relay is seating tightly in its socket. You should have some resistance when you remove and insert the relay.
Also look for corrosion in the relay socket.

17th Nov 2024 11:14am

SuperDMan

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

Nosnibod - just went and tried that, doesn’t appear to be the hazard switch. Thanks for suggestion tho, let me know if you can think of anything else.

Balvaig - that’s what I thought it’d be as well. Connection seems good and clean.

17th Nov 2024 11:47am

nosnibod

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

If the relay is buzzing then that means that the switch side isn’t receiving enough volts/amps, so nothing on the circuit it’s controlling (I.e. the indicators themselves) will alter anything. So, check everything on the path from the battery, to the fuse box, the hazard switch, the indicator switch and the relay, including the earths.

The wiring diagram for a Td5 is available here https://www.lrworkshop.com/wiring-diagram/...tor-hazard - that should help make sense of things. Dave
Green Goddess - 1998 Defender 110 300tdi

17th Nov 2024 1:50pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5729

2006 Defender 110 Td5 USW Zermatt Silver

It could have a poor negative. And that is an easy thing to check. Find which terminal on relay is neg, and shove a temporary neg in there.

17th Nov 2024 2:01pm

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