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Craig772

Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73

Bridged socket - What and why?

Hi all,

I am digging around behind the dash instrument panel and have found this socket that is bridged. Does anyone know what the socket is for and why it would be bridged? Presumably it's for an option I have don't have on my 2000 TD5 90 CSW.

TIA.

Click image to enlarge https://www.instagram.com/roxi_defender90/

3rd Feb 2024 3:39pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6477

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

Dim dip unit has been removed and the socket bridged to maintain normal headlamp function.

1988 90 Td5 NAS soft top

2015 D90 XS SW

3rd Feb 2024 3:48pm

Craig772

Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73

Thanks @Martin. A quick Google of 'Defender Dim Dip' threw up a couple of discussion threads.

Apparently the Dim Dip relay passes a lower voltage to the dipped headlight connection when the side lights are on and the oil pressure switch is open. The oil pressure switch is used as an indication that the engine is running, so you can have just the side lights on when parked.

Having a dim-dip system in your car was a regulation that came about in the 80s in the UK, but is no longer necessary. The feature was fitted right into the Puma model.

Seems there's a bypass relay available - YWZ10003L but the bridge works just as well.

Thanks. https://www.instagram.com/roxi_defender90/

3rd Feb 2024 4:04pm

PaulMc

Member Since: 17 Jan 2009
Location: Kent
Posts: 486

There is a Genuine bypass unit to replace the dim-dip relay - YWZ10003L

Click image to enlarge

But, it costs around £35

https://rimmerbros.com/Item--i-YWZ10003L

. Paul.
1989 Arles Blue 2.5TD 110 Hardtop
1999 Epsom Green Discovery II 4.0 V8i 'XS'

3rd Feb 2024 4:13pm

Craig772

Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73

Hmmm £35 or leave the bridge in...

https://www.instagram.com/roxi_defender90/

3rd Feb 2024 4:28pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 16857

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

If you pop the lid off the official bypass unit all you will find is a short length of wire linking the two spades together.

In effect you're paying £35 for a plastic cover.

An even simpler solution is to unplug the dim-dip resistor, although this means that the DD relay is still required. If the relay fails, bridge the terminals as in the OP's picture.

3rd Feb 2024 4:43pm

Craig772

Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73

I think I'll leave the bridge in but make it a bit more robust with some tape. https://www.instagram.com/roxi_defender90/

3rd Feb 2024 9:10pm

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