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Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 833

Ignition switch wiring help please

Wanting to go from the old type ignition switch to new type with steering lock

1 is brown
2 is white black
3 is red white
4 is brown
5 is brown and red

If I swop them straight over number for number it won’t start

I just wondered if anyone could advise a different way of wiring?

Click image to enlarge

Click image to enlarge

Cheers

Bps

23rd Jun 2018 3:08pm

mark13

Member Since: 16 Apr 2018
Location: Essex
Posts: 56

Sorry I can not directly answer your question but I can tell you a way I would find the answer. First draw a grid 5 high 5 wide three times. Then get the switches on the desk and get a multimeter and check the continuity between each pin on the first switch, marking a cross is each box on the grid that has a connection. Then draw another 3 grids and do the same on the new switch. The pin config will then be obvious when compare the grids.

23rd Jun 2018 4:26pm

Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 833

23rd Jun 2018 4:42pm

Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 833

It’s only 2 Switches, managed to double post the 2nd picture

23rd Jun 2018 4:47pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

What's the part number of the new switch please?

1988 90 Td5 NAS soft top

2015 D90 XS SW

23rd Jun 2018 5:18pm

Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 833

Hi Martin, Part number is QRF100870

Cheers

Brad

23rd Jun 2018 5:38pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

New switch is PRC2735 aka Lucas 162SA

Connect as follows:

1: White = Ignition switched out
2: Brown/red = glow plug
3: White/Black = fuel solenoid
4: White/red = starter
5: Brown = battery live in

1988 90 Td5 NAS soft top

2015 D90 XS SW

23rd Jun 2018 6:09pm

Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 833

Many thanks Martin 👍

That’s tomorrow mornings job sorted. Much appreciated !!

23rd Jun 2018 6:36pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

I know you said brown twice in your first post but I am assuming that's a typo and one should be white (old pin 4). If you actually have two browns then the one to your old terminal 4 is the ignition switched out and should go to new terminal 1.

1988 90 Td5 NAS soft top

2015 D90 XS SW

23rd Jun 2018 6:48pm

Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 833

Typo, should read white 👍

23rd Jun 2018 7:20pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

Did it work? (fingers crossed!)

1988 90 Td5 NAS soft top

2015 D90 XS SW

27th Jun 2018 10:08am

Bps

Member Since: 14 Feb 2016
Location: Lancashire
Posts: 833

Spot on Martin, many thanks I should have posted sooner, your help is very much appreciated. It’s surprising how the small things make a difference. I’d not realised how stiff the old barrel was and it’s nice having a bigger plastic key instead of the old small metal one 👍

27th Jun 2018 1:34pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6611

Great

1988 90 Td5 NAS soft top

2015 D90 XS SW

27th Jun 2018 1:55pm

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