Rear fogs

Deck1ng · Feb 3rd, 2019, 12:13

I’m driving a 2012 D5 SE AWD
My question is, should both rear fog lamps illuminate? I realise by law I only need one, either centre or off side. Both lamps have good bulbs and are both connected to the loom, it is the offside that is working.
Thanks in advance
Deck1ng

Spike56 · Feb 3rd, 2019, 12:21

The oft asked question!

The thinking is that if both lights were illuminated it becomes difficult to distinguish between fog lights and brake lights. When the single foglight is lit then you KNOW where the outer edge of the car in front is.

All well and good. However, I prefer both lit. If you cannot see the RUNNING lights of the car in front perhaps you should not be moving. If I see a car with 2 red lights lit...….I know there is a car there!

So. No, it is normal now to have just the one. (Although you could "enable" the second connection with a little d.i.y.!!)

Deck1ng · Feb 3rd, 2019, 12:47

I’m always up for a bit of DIY

Shadeyman · Feb 5th, 2019, 18:33

might give the DIY thing a go myself.

Fat Magpie · Feb 5th, 2019, 19:24

As far as I know:

One fog light is illuminated during normal driving (in fog) but if you make an emergency stop/hard braking, the other fog light starts flashing.

One light only for the fog light brake light confusion thing.

AndyJudge · Feb 5th, 2019, 19:59

Quote:

Originally Posted by Fat Magpie

As far as I know:

One fog light is illuminated during normal driving (in fog) but if you make an emergency stop/hard braking, the other fog light starts flashing.

One light only for the fog light brake light confusion thing.

Yep that's what I thought the 2nd illuminates in emergency stop type situations.

MacV50 · Feb 6th, 2019, 10:34

Both of mine illuminate when I turn the fogs on. Not sure about the emergency braking situation

MY2017 XC60

MikeGMT · Feb 6th, 2019, 13:32

Quote:

Originally Posted by MacV50

Both of mine illuminate when I turn the fogs on. Not sure about the emergency braking situation

MY2017 XC60

Ditto, both of mine illuminate, MY16.

Regarding the emergency braking it is only the brake lights that flash to be replaced by the hazards once the car has slowed down.

GMcL · Feb 6th, 2019, 17:47

Quote:

Originally Posted by Deck1ng

I’m driving a 2012 D5 SE AWD
My question is, should both rear fog lamps illuminate? I realise by law I only need one, either centre or off side. Both lamps have good bulbs and are both connected to the loom, it is the offside that is working.
Thanks in advance
Deck1ng

Someone asked how to do it in a General thread. I posted this reply.

I've got a 2011 S60, I had to wire up the nearside bulb when I exported my car.

I asked a Volvo main dealer to do it, they ran a wire from one bulb to the other which, unsurprisingly, tripped out.

benr7310 · Feb 7th, 2019, 07:41

Interesting mod!

May have to do this!

Feb 3rd, 2019, 12:13	#1
Deck1ng Master Member Last Online: Yesterday 23:51 Join Date: Apr 2018 Location: North Yorkshire	Rear fogs I’m driving a 2012 D5 SE AWD My question is, should both rear fog lamps illuminate? I realise by law I only need one, either centre or off side. Both lamps have good bulbs and are both connected to the loom, it is the offside that is working. Thanks in advance Deck1ng

Feb 5th, 2019, 19:24	#5
Fat Magpie Senior Member Last Online: Apr 18th, 2024 11:47 Join Date: Mar 2015 Location: Belfast and London	As far as I know: One fog light is illuminated during normal driving (in fog) but if you make an emergency stop/hard braking, the other fog light starts flashing. One light only for the fog light brake light confusion thing. __________________ XC60 MY10 AWD D5 Summum 205 PS, Geartronic, Winter pack, Aux diesel heater, Xenons, Family pack, Tinted rears, Moonroof, Parking sensor F&R, Premium sound, Car phone, Reversing camera, Lane departure, Hill decent, Savile Grey.

Feb 7th, 2019, 07:41	#10
benr7310 Master Member Last Online: Dec 29th, 2023 17:48 Join Date: Sep 2011 Location: Thurrock	Interesting mod! May have to do this! __________________ V60 D5 215 (pre-facelift) Ex-S40 Sport 2.0d with 180bhp & 300lbft

Feb 3rd, 2019, 12:21	#2
Spike56 Master Member Last Online: Apr 25th, 2024 15:44 Join Date: Feb 2013 Location: Orpington	The oft asked question! The thinking is that if both lights were illuminated it becomes difficult to distinguish between fog lights and brake lights. When the single foglight is lit then you KNOW where the outer edge of the car in front is. All well and good. However, I prefer both lit. If you cannot see the RUNNING lights of the car in front perhaps you should not be moving. If I see a car with 2 red lights lit...….I know there is a car there! So. No, it is normal now to have just the one. (Although you could "enable" the second connection with a little d.i.y.!!)

Feb 3rd, 2019, 12:47	#3
Deck1ng Master Member Last Online: Yesterday 23:51 Join Date: Apr 2018 Location: North Yorkshire	I’m always up for a bit of DIY

Feb 5th, 2019, 18:33	#4
Shadeyman VOC Member Last Online: May 28th, 2020 23:57 Join Date: Jun 2012 Location: Wolverhampton	might give the DIY thing a go myself.

Feb 6th, 2019, 10:34	#7
MacV50 Master Member Last Online: Yesterday 19:19 Join Date: Feb 2012 Location: Aberdeen	Both of mine illuminate when I turn the fogs on. Not sure about the emergency braking situation MY2017 XC60

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