A A A
Avatar

Please consider registering
Guest

Search

— Forum Scope —






— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

Register Lost password?
sp_Feed sp_PrintTopic sp_TopicIcon
d7 twin switch rec/regulator
Avatar
Unitminor
Norfolk
Second Gear User
Site Member
Forum Posts: 36
Member Since:
February 27, 2018
sp_UserOfflineSmall Offline
1
September 9, 2019 - 7:24 pm
sp_Permalink sp_Print

1965 D7 Twin switch 1704 generator

I wanted to convert it to a gel battery so I fitted an A REG 6 unit

I knew from what I had seen on the web site that I would probably lose the emergency start which was no problem . But what I got was when the head light was turned on both it and the rear light pulsated ( flashed ) now seeing if I am  correct the same coil is used for the emergency start as the head light . Would it be that the rec/reg is some how interfering with the light making it pulsate ? the charging side of it works . Putting it back to original the lights work ok .

it is wired from the generator 

no3 dark red to the ign switch and then the lighting switch

no1 white to rectifier

no4 orange to rectifier 

The wiring harness is correct and the generator is virtually new as both were bought from CD autos several years ago then the bike was laid up for several years so they have not had hardly any use . 

I did run a a wire from the battery to the head light after disconnecting the ac wire but that was no good as also said on the web site as the charging could not cope with it . So does any one know of a way that it could be wired in with out being to complicated I have had a look on the forum to see if I could find any info on that but so far no luck probably on there so will carry on looking .

Avatar
carpetralph
Pontefract
Top Gear User
Club Member
Forum Posts: 52
Member Since:
August 19, 2019
sp_UserOfflineSmall Offline
2
September 10, 2019 - 6:51 am
sp_Permalink sp_Print

Hi, sorry I can`t be of much help, but I have just fitted a rec/reg on my D14, and I know when I was shopping around some were specifically listed for dynamo models, and others for alternator models, are you sure you got the right one.

Avatar
Unitminor
Norfolk
Second Gear User
Site Member
Forum Posts: 36
Member Since:
February 27, 2018
sp_UserOfflineSmall Offline
3
September 10, 2019 - 7:59 am
sp_Permalink sp_Print

Yes it is for an alternator it charges the battery ok it is just when the head light is on that the problem happens 

Avatar
sunny
Norfolk
Top Gear User
Club Member
Forum Posts: 1276
Member Since:
January 9, 2013
sp_UserOfflineSmall Offline
4
September 10, 2019 - 8:35 am
sp_Permalink sp_Print

the  2  switch   D7   wiering  loop  is  ONLY   for  the  1704  geny   without  combind reg/rectyfier   ,, wen  the  1704  is rongly   wiered   it can  run up  very  high   volts   and  will   cook  any    reg/rec   on  a 6volt  charge      unit   is  wy   i  dont   recamend mixing the  2    ,,   you need  to rewier  as per  advice  from  C&D aoutos   so  as  if   thay   still  have  copes    ,   if  not   i recamend  just   using  a  rectyfier    as i do  on  my  d 3 &7  with  the  1704  geny  

Avatar
mike p5xbx
E-Sussex
Top Gear User
Site Member
Forum Posts: 1575
Member Since:
June 15, 2012
sp_UserOfflineSmall Offline
5
September 10, 2019 - 5:19 pm
sp_Permalink sp_Print

This is the wiring diagram from Rooster ignitions when they were selling them
whether it works ok I don’t know
D7 T/Sw is peculiar in using AC to the ign coil when switched to Emergency, note the two Maroon wires going to the coil
don’t think that would do the R/Reg much good

d7ds-with-rr.png

sp_PlupAttachments Attachments

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

Avatar
Unitminor
Norfolk
Second Gear User
Site Member
Forum Posts: 36
Member Since:
February 27, 2018
sp_UserOfflineSmall Offline
6
September 10, 2019 - 8:06 pm
sp_Permalink sp_Print

Thanks for that Mike it gives me some thing to think about as I really would like to do away with the lead acid battery's  . I am running my dynamo charging bikes on gel battery s it is just the Bantam s to change . It is good not to have to keep charging and replacing the battery because it has no last unlike the modern gel which seem to go for a lot longer .

Brian                                                                                                   

Avatar
mikef
Chatham Kent
Club Technical Advisor
Committee
Forum Posts: 803
Member Since:
September 30, 2011
sp_UserOfflineSmall Offline
7
September 10, 2019 - 8:09 pm
sp_Permalink sp_Print

Oh yes, I have seen this diagram before and was not happy with it.
In it's standard form the twin switched D7 headlamp is powered by the lighting coil of the generator and will therefore only work with the engine running.
In the diagram from Rooster ignitions the dark red wire that powers the headlamp is connected to the battery. The idea being to convert it to battery powered.
That will work but unfortunately if the ignition switch is turned to the "E" position it will cause a short circuit when the points are closed.
The answer would be to remove the maroon wire from the ignition switch to the ignition coil, thus removing the emergency start option.
There is also another problem with that diagram, the dark red wire from the generator on pin 3 is connected to the orange wire on pin 4, I am sure the thinking behind that is that all three coils would be connected in parallel. Unfortunately that is not so as one end of the lighting coil is connected to earth.
The only way around that would be to remove the earth connection at the lighting coil and connect that coil end to pin 1. That would put all three coils in parallel.
Hope that makes sense.
                     Mike.

Avatar
Unitminor
Norfolk
Second Gear User
Site Member
Forum Posts: 36
Member Since:
February 27, 2018
sp_UserOfflineSmall Offline
8
September 11, 2019 - 6:10 pm
sp_Permalink sp_Print

Thanks Mikef tried it this afternoon connected as you said the 3 red to 4 . And the white wire 2 to 1 as that was coming from the coil to earth 2 pin . But unfortunately it did not work so it looks like it is back to lead acid battery . So it looks unless some one has used one of these r/r and it worked I will have to give up on it .

Brian

Avatar
mike p5xbx
E-Sussex
Top Gear User
Site Member
Forum Posts: 1575
Member Since:
June 15, 2012
sp_UserOfflineSmall Offline
9
September 11, 2019 - 11:42 pm
sp_Permalink sp_Print

Unitminor said
But unfortunately it did not work
Brian  

did not work in which way ?

what you have now, coil wiring not loom wiring
is the top coil connected to T1 white wire T4 Orange
bottom coils
T2 White T3 Red (could be very dark red)

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

Avatar
Unitminor
Norfolk
Second Gear User
Site Member
Forum Posts: 36
Member Since:
February 27, 2018
sp_UserOfflineSmall Offline
10
September 12, 2019 - 6:42 pm
sp_Permalink sp_Print

Yes the connections are like that if I did it rite I connected the dark red t3 to the orange connected t4 . The white wire t2 which was earthed was disconnected from earth and joined to white t1 . 

I have now got it working by leaving 1 & 4 as connected going to the rectifier ac in . The breakthrough was disconnecting the dark red from the ign switch and connecting it directly to the lighting switch . I have had it running with the head light on and all seems well the generator is showing a charge on the amp meter and the head light is working at a steady beam .

Thanks to the 2 Mikes for there input with out it I may have gave up 

Brian

Avatar
mike p5xbx
E-Sussex
Top Gear User
Site Member
Forum Posts: 1575
Member Since:
June 15, 2012
sp_UserOfflineSmall Offline
11
September 12, 2019 - 11:49 pm
sp_Permalink sp_Print

well done perseverance always pays off in the end,

but im now curious did you also join the dark red wire from the ign switch to the brown wire going to the regulator and battery as in the diagram above

D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

Avatar
Unitminor
Norfolk
Second Gear User
Site Member
Forum Posts: 36
Member Since:
February 27, 2018
sp_UserOfflineSmall Offline
12
September 13, 2019 - 11:06 am
sp_Permalink sp_Print

No I disconnected  the red wire where the wire from the generator joins the main wiring harness then ran a wire from the generator red wire to the light switch . The red wire that joined the ignition switch to the light switch I parted so the ign switch was disconnected from the light switch  the wire that I added was connected to the light switch red wire . I put bullet connectors and isolated any unsed wires so it could easily be put back as it was if needed . So  the head light is still ac with the engine running the only difference is there is no emergency start .So to summarise the original parts are still on the bike if needed and it would only take a few minutes to unplug the wires and reconnect the original parts .

Forum Timezone: Europe/London

Most Users Ever Online: 223

Currently Online:
5 Guest(s)

Currently Browsing this Page:
1 Guest(s)

Top Posters:

Cornish Rooster: 3314

Anderzander: 3208

bart: 3134

cocorico: 2970

Sprung Chicken: 2650

Mags 1: 2612

David Dale: 2489

Munchkin: 2229

Blue Heeler: 2139

Katj: 2138

Newest Members:

_1984

Forum Stats:

Groups: 9

Forums: 46

Topics: 11972

Posts: 102819

 

Member Stats:

Guest Posters: 518

Members: 3415

Moderators: 3

Admins: 3

Administrators: Piquet, JMD, Rusty Floater

Moderators: xcgb, Mick W, Stoo63