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  #81 (permalink)  
Old 08-10-2018, 04:05 AM
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Quote:
Originally Posted by CompClassics View Post
The resistor is a back up in case the charging indicator bulb fails, this allows the charging system to continue to operate normally. If the resistor is not in the circuit and the charging indicator bulb fails your charging system will not operate. Since the bulb does not illuminate in this situation you may or may not realize that the fault with the system is the bulb and not another component in the charging system.
Thanks, that makes sense. For some reason UK customers don't get the failsafe! I don't think any of my older Brit sportscars had a resistor in parallel, although some MGs etc. did have a fine restistance wire wound around the warning light casing which was presumably there for that purpose. None of the later Healeys or TRs did, though - pretty sure original Cobras didn't either. Obviously this is for cars with Lucas electrics, not Ford/Autolite.
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  #82 (permalink)  
Old 02-06-2019, 04:38 AM
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Still struggling with my setup…

Can anyone tell me the difference between a D4TZ10316A and a C5AF-10316-A Regulator?
I got told I need to change my Regulator to a D4TZ10316A to match the Alternator which is a Thunderbird C3SF-10300-A Version…..

But at the end they are all doing the same (Field Relay; Voltage Limiter)??


The point I’m struggling at the moment is the following:
Is it correct that the Alternator provides 12V on the Neutral Terminal as soon the Output Terminal gets 12V+ connected?
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  #83 (permalink)  
Old 02-06-2019, 04:44 AM
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Alf,

The D4TZ regulator is an electronic version, the C3SF is mechanical. Generally you can substitute an electronic unit for a mechanical. You can remove the cover of the electronic and replace with the mechanical to gain a closer to original appearance. There are several reproduction regulators that have the tall cover with the "IASF" stamped into them that have electronic guts.
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  #84 (permalink)  
Old 02-06-2019, 05:00 AM
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Hi Mark IV
My main question is DO I NEED TO REPLACE the mechanical C5AF-10316-A Regulator with an electronic D4TZ10316A Regulator to work with my Thunderbird C3SF-10300-A Alternator....
I would say NO and the guy told me rubbish.

As I was hoping to get an answer on my "Neutral Terminal" question (as on post 82) and I got only the information that my wiring and the regulator are incorrect.
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  #85 (permalink)  
Old 02-06-2019, 06:05 AM
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Quote:
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Hi Mark IV
My main question is DO I NEED TO REPLACE the mechanical C5AF-10316-A Regulator with an electronic D4TZ10316A Regulator to work with my Thunderbird C3SF-10300-A Alternator....
I would say NO and the guy told me rubbish.

As I was hoping to get an answer on my "Neutral Terminal" question (as on post 82) and I got only the information that my wiring and the regulator are incorrect.
No, you do not need to replace it.
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  #86 (permalink)  
Old 02-06-2019, 06:40 AM
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No, you do not need to replace it.
As expected!
Thanks
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  #87 (permalink)  
Old 02-06-2019, 07:15 AM
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After looking some great videos from MOSS on Youtube and googling I think (hope) I fund the issue!

I need to adjust the field relay on the regulator to stop closing the contact immediately after the battery is connected to the alternator. It needs only to close after the alternator is running and producing power!

I found a value of > 6V measured on the S contact of the regulator. (But I hope someone can confirm this Volt value)
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  #88 (permalink)  
Old 02-06-2019, 08:53 AM
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ALF,

You should pick up one of these manuals, great information and wiring diagrams.....

https://rover.ebay.com/rover/0/0/0?m...2F382760249638
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  #89 (permalink)  
Old 02-06-2019, 10:16 PM
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Hi John
Many thanks for the recommendation.
I'm in contact with the seller to get the shipment to Europe enabled.
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Last edited by ALF; 02-07-2019 at 10:48 PM..
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  #90 (permalink)  
Old 02-07-2019, 10:48 PM
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The manual is on the way!
Now I need to wait some weeks and after that I'll know the Volt value the Field Relay has to be set.
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  #91 (permalink)  
Old 02-08-2019, 01:18 PM
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The manual is on the way!
Now I need to wait some weeks and after that I'll know the Volt value the Field Relay has to be set.
PM'd you.
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  #92 (permalink)  
Old 02-08-2019, 11:46 PM
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Thank you for the PM
Not less than 3V or mire than 4V
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Last edited by ALF; 02-09-2019 at 12:52 AM..
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