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HK07

Member Since: 15 Dec 2016
Location: Hampshire
Posts: 755

2007 Defender 90 Puma 2.4 HT Cairns Blue

200 tdi Alternator Problems - help please.

Hi Guys

So working on my project rebuild and I have a problem with the alternator wiring.

When we took the engine out I seem to remember it having a black wire from the top terminal in the picture below to the adjacent engine mount. I do remember thinking that needs securing better than that and took it off but never took a picture first

Fast forward a year and I can't quite remember what went where, and I don't want to do any damage.

Click image to enlarge

At the moment it starts and runs fine, but the battery light is on on the dash and I presume we are not charging the battery.

Can I reconnect a wire from that terminal to said engine mount or will that do damage? All the alternators wiring is rough and needs tiding up before the wings go back on.

I would have thought it would get its earth from the bolts holding it on to the block.

Thanks in advance. 2007 90 Puma - Love it - Best car I have ever owned.

1989 Ninety 200tdi - Love it - Second best car I have ever owned.

1951 80" Series 1 - Love it - Third best car I have ever owned.

28th Aug 2018 12:07pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

What wire colour do you have for Alternator wiring

two brown 6mm2 wire

with large spades terminal B+ out put from Alternator to battery

one brown yellow 1.5mm2

small spade terminal D+ from dash battery lamp

https://www.defendersource.com/forum/f6/20...97345.html

Last edited by dorsetsmith on 28th Aug 2018 1:42pm. Edited 4 times in total

28th Aug 2018 12:53pm

HK07

Member Since: 15 Dec 2016
Location: Hampshire
Posts: 755

Thanks for the speedy response.

Sorry but that does not mean anything to me. 2007 90 Puma - Love it - Best car I have ever owned.

1989 Ninety 200tdi - Love it - Second best car I have ever owned.

1951 80" Series 1 - Love it - Third best car I have ever owned.

28th Aug 2018 12:57pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6736

2015 Defender 90 Puma 2.2 XS CSW Montalcino Red

The top terminal/stud with the "W" next to it is for a rev counter.

The battery light is connected to the smaller wire on the bottom set of three spades (two of which are wrapped in white tape).

The red spade with the (hopefully) BROWN with YELLOW wire is the battery warning light feed.

Your wiring has definitely been mucked about with - the proper alternator plug is missing. The two white-wrapped spades and the warning light spade should be in a proper plug: https://polevolt.co.uk/acatalog/Lucas-Alte...tml#SID=53

1988 90 Td5 NAS soft top

2015 D90 XS SW

28th Aug 2018 1:05pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

HK07 wrote:
Thanks for the speedy response.

Sorry but that does not mean anything to me.

HK07 sorry on the mobile phone start with

have up dated post hop it make sense now

28th Aug 2018 1:32pm

HK07

Member Since: 15 Dec 2016
Location: Hampshire
Posts: 755

Thanks guys, so the dangling wire is probably from when the alternator came from a different vehicle that had a revcounter.

Why is my battery light on permanently? If it wasn't on at all I would say a connection fault but with it on permanently I really am confused.

Much obliged for all the advice.

Cheers

HK07 2007 90 Puma - Love it - Best car I have ever owned.

1989 Ninety 200tdi - Love it - Second best car I have ever owned.

1951 80" Series 1 - Love it - Third best car I have ever owned.

30th Aug 2018 4:02pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

Click image to enlarge

Click image to enlarge

you my have problem with your alternator regulator or brushes

30th Aug 2018 4:13pm

HK07

Member Since: 15 Dec 2016
Location: Hampshire
Posts: 755

Thanks dorsetsmith.

That's explains the system very well, now we have to find out why it's not working. 2007 90 Puma - Love it - Best car I have ever owned.

1989 Ninety 200tdi - Love it - Second best car I have ever owned.

1951 80" Series 1 - Love it - Third best car I have ever owned.

30th Aug 2018 4:29pm

HK07

Member Since: 15 Dec 2016
Location: Hampshire
Posts: 755

Don't I feel silly!!!

Took her on a bit of a drive today, and when the revs rise a little the light goes out.

Thanks anyway guys

2007 90 Puma - Love it - Best car I have ever owned.

1989 Ninety 200tdi - Love it - Second best car I have ever owned.

1951 80" Series 1 - Love it - Third best car I have ever owned.

31st Aug 2018 8:16pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6736

It's not had an LED bulb fitted in that position by any chance?

1988 90 Td5 NAS soft top

2015 D90 XS SW

31st Aug 2018 8:55pm

HK07

Member Since: 15 Dec 2016
Location: Hampshire
Posts: 755

Don't think so - I'll check.it though. 2007 90 Puma - Love it - Best car I have ever owned.

1989 Ninety 200tdi - Love it - Second best car I have ever owned.

1951 80" Series 1 - Love it - Third best car I have ever owned.

31st Aug 2018 8:59pm

Martin
Site Admin

Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6736

OK I just wonder if the alternator is not being excited correctly on the D+ (warning light) wire and so it's taking more revs to get it to kick in and start charging.

1988 90 Td5 NAS soft top

2015 D90 XS SW

31st Aug 2018 9:00pm

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