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What diode and where to get one?
Krismc - 27/3/11 at 09:49 AM

What diode should i fit too prevent the alternator frying agian, the wire from the charge light is back feeding to the alternator??


The problem is the bright6 unit, its wired correctly but sends 12.5v down the charge light wire too the alternator

tomgregory2000 - 27/3/11 at 10:14 AM

I seem to remember that i fitted one of these

My mistake, not this one

[Edited on 27/3/11 by tomgregory2000]

David Jenkins - 27/3/11 at 10:41 AM

Not sure that you need a zener diode like that one - more like one of these ordinary rectifier diodes, physically robust and will take around 6A, which is more than enough.

ReMan - 27/3/11 at 10:42 AM

quote:
Originally posted by tomgregory2000
I seem to remember that i fitted one of these
`

Sorry, but you don't want a zener diode , that for voltage regulation.
If its just to stop backfeed then you just need an ordinary diode.
I think that a 1N4001 1A will do it.
I can probably post you one of those, if thats whats required.

lsdweb - 27/3/11 at 04:02 PM

Hi Guys

Is this a common problem with Bright 6's? I'm just in the process of fitting one to my Elan and want to get it right!

Ta

Wyn

Krismc - 27/3/11 at 04:08 PM

quote:
Originally posted by ReMan
quote:
Originally posted by tomgregory2000
I seem to remember that i fitted one of these
`

Sorry, but you don't want a zener diode , that for voltage regulation.
If its just to stop backfeed then you just need an ordinary diode.
I think that a 1N4001 1A will do it.
I can probably post you one of those, if thats whats required.


If you got a spare, that would be great, Mapins is about 1hr round trip on a good day and im at work all this week, would like too go to the kit car club on wed evening but not risking damaging my new alternator for a 24p part

[Edited on 27/3/11 by Krismc]

Krismc - 27/3/11 at 04:09 PM

quote:
Originally posted by lsdweb
Hi Guys

Is this a common problem with Bright 6's? I'm just in the process of fitting one to my Elan and want to get it right!

Ta

Wyn


it looks that way, ive been checking the net and a lot of people have had the same faults.

Krismc - 27/3/11 at 04:25 PM

quote:
Originally posted by David Jenkins
Not sure that you need a zener diode like that one - more like one of these ordinary rectifier diodes, physically robust and will take around 6A, which is more than enough.



Do i need a In4001 or a In4003 ??

and its the white striped end of the diode(cathode) towards the bulb and the anode too the alternator (ie diode pointing away from alt) ??

David Jenkins - 27/3/11 at 09:17 PM

quote:
Originally posted by Krismc
Do i need a In4001 or a In4003 ??


Either will do - the only difference is current rating. Personally I'd go for a 4002 or 4003, but I'm sure that a 4001 would work just as well.

Can't give you any help on which way round to wire it in - I didn't need one when fitting a Bright-6 to my car!

Krismc - 28/3/11 at 06:32 AM

I

quote:
Originally posted by David Jenkins
quote:
Originally posted by Krismc
Do i need a In4001 or a In4003 ??


Either will do - the only difference is current rating. Personally I'd go for a 4002 or 4003, but I'm sure that a 4001 would work just as well.

Can't give you any help on which way round to wire it in - I didn't need one when fitting a Bright-6 to my car!



Your wiring loom didnt come from guy who made mine, no diagram with it and colours change front to back ie green at front is fuel pump but its pink at connector. . Wish I had a proper wiring diagram.