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CRJ

Member Since: 12 Mar 2011
Location: Sealand - Denmark
Posts: 253

1991 Defender 90 200 Tdi ST Alpine White

Charge light flicker at high revs.

Hi. Any chance of a “quick fix” of the generator if the charge light flickers at high revs...been advised to buy a Denso....but the defender has been draining all available funds since I aquired it....It is a Td5 - 2002. It keeps the battery in good shape - I see the flicker as a warning of things to come😅
Regards Chr 88 Ser. 3 1980 -sold
Puma 130 - 08- sold
90 200tdi 1991 - sold
88 Ser. 3 1977 200 TDI
110 CC 2003

26th Jan 2021 6:34am

jeffersj

Member Since: 23 Jan 2015
Location: Near Preston
Posts: 431

1996 Defender 90 300 Tdi HT Bronze Green

I don't suppose that the drive belt is slipping at high revs without it squealing, how old is the belt or is it worn? Also try swapping warning light bulbs just in case it is on its way out. Jeff
Ex 1968 Series 2A
Ex 90 TD5
Ex D3
Ex D4

26th Jan 2021 9:23am

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8007

2011 Defender 110 Puma 2.4 USW Stornoway Grey

if the battery is fully charged then maybe the alt is not charging it and hence the flickering?

whats the actual battery voltage? Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

26th Jan 2021 10:39am

CRJ

Member Since: 12 Mar 2011
Location: Sealand - Denmark
Posts: 253

Thanks 👍 The belt is worn - but did not think of it as there was no squealing...but it needs to be changed anyway.
Voltage on batt is 12.8. when engine is at idle it is 14.7
Regards
Christian 88 Ser. 3 1980 -sold
Puma 130 - 08- sold
90 200tdi 1991 - sold
88 Ser. 3 1977 200 TDI
110 CC 2003

26th Jan 2021 12:13pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8007

whats the voltage when the light if flickering?

When we built comp trucks with twin 100A plus alternators when the batts were fully charged the light would flickers or show very dimly, the latter being a more accurate description as the alts werent putting out much output as system didnt need it.

14.7 seems a little high.

try measuring voltage at tickover across battery compared to back of alternator.

then turn on lights and any other electrical loads what happens to the reading?

turn them off what then happens?

Try same at higher >1600rpm engine revs. let us know Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

26th Jan 2021 12:30pm

CRJ

Member Since: 12 Mar 2011
Location: Sealand - Denmark
Posts: 253

Hey - really appreciate the help! Work just been draining me for a while😇...I will be around the car next week - and check as recommended.
Regards
Christian 88 Ser. 3 1980 -sold
Puma 130 - 08- sold
90 200tdi 1991 - sold
88 Ser. 3 1977 200 TDI
110 CC 2003

4th Feb 2021 4:34pm

jst

Member Since: 14 Jan 2008
Location: Taunton
Posts: 8007

Cheers

James
110 2012 XS Utility
130 2011 M57 bespoke Camper
90 2010 Hardtop
90 M57 1988 Hardtop

6th Feb 2021 11:01pm

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