CSX2201 and later charging system components

[CompClassics]

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.

The diagram that I posted is directly from the 1964 Ford training manual for the Ford charging system with an alternator and with or without the amp meter. This manual is applicable to the 289 Cobras equipped with the Ford, wiring harness, alternator, regulator and Stewart Warner gauges.

[ALF]

Hi John
Did you recognize the difference at the Ammeter drawing between the drawing out of the Ford Manual and the other from the Autolite Manual?

On the Autolite is a connection between Alternator-O, Battery-+ and Regulator-I.
The rest seems to be identical and it seems to me the source for this drawings was the same.

[ALF]

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?

[Mark IV]

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.

[rsk289]

Originally Posted by CompClassics

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.