Alternator wiring help please

Jon March

Member
I removed my Lucas generator and purchased this internally regulated triumph alternator and proper brackets- it's all mounted nicely, not hooked up as yet though

But… It's not a "single wire GM marine/spark-protected alternator that others have reccommended since then…
Can anyone tell me how this would be wired in?

there were only two wires attached to the generator a heavy black wire and a smaller brown wire but I'm not sure at all about what to do with the wall-mounted voltage regulator or it's connections so can anyone talk me through I would appreciate... or can this alternator not be used after all?

image.png
image.png
 
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DavidC

Amphicar Expert
It super easy Jon.
First remove the old voltage regulator and throw it over the nearest hedge.
That Lucas RB106 "regulator" was never great back in the day but batteries back then were better able to cope with voltage swings from 9 to 16 which is what it does. Its unreliability is one of the reasons Triumph started fitting alternators which do all the voltage regulation internally, in the mid 1960s.
What's left with the regulator gone is a fat wire to the car, fat wire to the battery and a thin wire to the light in the cluster gauge.
The thin wire goes to the smaller terminal on the alternator.
Then you need a fat wire from one of the two large terminals on the alternator (doesn't matter which one) to the other 2 fat wires.
The way I normally do it is use the starter solenoid. Wire from battery positive terminal to one of the 8mm terminals on that and connect the main feed (fat wire) to the car and the fat wire from the alternator to the same terminal. The other 8mm terminal on that solenoid goes to the starter motor of course.
Job done !
 

strandweiss62

Active Member
I disassembled the regulator, soldered in some wires to add a 40 amps main fuse and use it as a connector for the wires. So it looks more originally.

Regulator Dummy.jpg


Regulator Dummy Top 3.jpg

For a more correct look swap brown and blue cable.
 
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Jon March

Member
All - i am confused that nothing is connected to the top lug which seems to be a crucial connection to one side of the fuse underneath -

Can you please tell me what the wires are on the right side - from top to bottom.
(..and if there are any connections missing in the picture that still need to be connected)

1st/top wire : horiz fat brown
2nd: horiz fat red
3: vertical thin blue
4: horiz fat black
5: vertical thin brown

whats missing to reed the top of the fuse?
 

Jon March

Member
heres a good question - i see that the major feed to the car electric goes thru the 40 amp fuse before feeding the rest....but no fuse on the thin brown/blue wire that travels the length of the car all the way up to to the alternator dash lite? (does it at least go thru a fuse at the forward fuseblock?)
 

strandweiss62

Active Member
A battery is able to deliver some hundreds amps, so short circuit can be real dangerous. The brown control connection delivers less than one amp.
 

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