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Martin
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Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6510
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
The reason the indicators work, then stop working when the hazard switch is pressed is because pressing the hazard switch disconnects the (working) ignition feed to the flasher unit, and it is supposed to switch over to a (not working) permanent feed to the flasher unit.

It also connects the output from the flasher unit to both the right and left indicators, and the warning lamp in the switch and the instrument panel.

It's why the hazard switch has so many pins Smile

You are 100% missing the permanent supply to the switch (this supply shared with the interior lights - also not working). Often changing the interior light bulbs can accidentally cause a short and therefore fuse 7 to blow, also knocking out the hazards (and clock, radio, etc).

You've not mentioned if the clock and radio are affected?

LR changed this for the 2002 onwards model year, putting the hazards on their own fuse.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1017157 2nd Dec 2023 5:20pm
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Mexirican007



Member Since: 30 Nov 2023
Location: Suffolk
Posts: 15
United Kingdom 1999 Defender 110 Td5 CSW Cobar Blue
Martin wrote:
That's pin 8, white/green wire which is the ignition feed (used for the indicators).

Is there power on the one next to it, pin 7, the purple/brown wire (permanent feed) - used for the hazards.

The lights will not be the issue as the indicators work!


The only one that lights up is Pin 8. I am about to buy a multi-meter. The purple/brown wire does not light up.
Post #1017166 2nd Dec 2023 7:05pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6510
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
That’s as expected given your issue.

Have you tested for power on Fuse 7?  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1017168 2nd Dec 2023 7:06pm
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Mexirican007



Member Since: 30 Nov 2023
Location: Suffolk
Posts: 15
United Kingdom 1999 Defender 110 Td5 CSW Cobar Blue

Click image to enlarge

I'm playing dumb, am I in the right area?
Post #1017169 2nd Dec 2023 7:10pm
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Mexirican007



Member Since: 30 Nov 2023
Location: Suffolk
Posts: 15
United Kingdom 1999 Defender 110 Td5 CSW Cobar Blue
Martin wrote:
The reason the indicators work, then stop working when the hazard switch is pressed is because pressing the hazard switch disconnects the (working) ignition feed to the flasher unit, and it is supposed to switch over to a (not working) permanent feed to the flasher unit.

It also connects the output from the flasher unit to both the right and left indicators, and the warning lamp in the switch and the instrument panel.

It's why the hazard switch has so many pins Smile

You are 100% missing the permanent supply to the switch (this supply shared with the interior lights - also not working). Often changing the interior light bulbs can accidentally cause a short and therefore fuse 7 to blow, also knocking out the hazards (and clock, radio, etc).

You've not mentioned if the clock and radio are affected?

LR changed this for the 2002 onwards model year, putting the hazards on their own fuse.


Clock and Radio works just fine
Post #1017170 2nd Dec 2023 7:13pm
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Mexirican007



Member Since: 30 Nov 2023
Location: Suffolk
Posts: 15
United Kingdom 1999 Defender 110 Td5 CSW Cobar Blue
I have to be going crazy? It is getting power

Click image to enlarge
Post #1017174 2nd Dec 2023 7:38pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6510
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Replace the fuse, use your probe on both metal points on the top of the fuse. Do both have power?

As your clock is ok I think they probably will, so looks like a broken wire between the header and the splice.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1017179 2nd Dec 2023 8:04pm
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Mexirican007



Member Since: 30 Nov 2023
Location: Suffolk
Posts: 15
United Kingdom 1999 Defender 110 Td5 CSW Cobar Blue
And it is so clean behind the switches....I guess I will be ripping apart everything to find it. Is there a good video to reference on youtube for this exploration?
Post #1017181 2nd Dec 2023 8:08pm
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410
United Kingdom 
Ok, how about running a positive live to pin 8 on the switch and seeing if that solves the problem. A parallel line might be a convenient solution.
Post #1017183 2nd Dec 2023 8:23pm
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Mexirican007



Member Since: 30 Nov 2023
Location: Suffolk
Posts: 15
United Kingdom 1999 Defender 110 Td5 CSW Cobar Blue
So that worked but I ended up blowing the 10 Amp fuse. The interior lights work now also.


Click image to enlarge
Post #1017332 3rd Dec 2023 11:05pm
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