Rectifier wiring

Stillreel · May 22, 2012

Trying to determine how to wire the rectifier. At which points do the leads attach? Does it matter? I've got the red (ground) off the top fitting, but no indication for the remaining BLUE/BROWN (Negative charge NU), GREEN/YELLOW (Alt. GY) and GREEN/WHITE (Alt. GW).

Any suggestions here?

Thanks
BC
71 Commando

DogT · May 22, 2012

The alternator wires probably do not matter, but I'm sure someone will call me on that.

Dave
69S

L.A.B. · May 22, 2012

Stillreel said:
Trying to determine how to wire the rectifier. At which points do the leads attach? Does it matter? I've got the red (ground) off the top fitting, but no indication for the remaining BLUE/BROWN (Negative charge NU), GREEN/YELLOW (Alt. GY) and GREEN/WHITE (Alt. GW).

Connect the brown/blue (not blue/brown) to the centre rectifier terminal (on early Commandos it was brown/white as shown in Dave's photo).

Green/yellow and white/green (not green/white) can go to either outer terminal.

Stillreel · May 22, 2012

Roger that. Thanks
BC

Josh Cox · May 22, 2012

The AC side does not matter which way around, the DC side does.

The rectifier is a simple bridge rectifier: http://en.wikipedia.org/wiki/Diode_bridge

sole survivor · May 22, 2012

Can a rectifier fail? What would be the symtom(s)?

DogT · May 22, 2012

Yes. No charging.

Dave
69S

sole survivor · May 22, 2012

DogT said:
Yes. No charging.

Dave
69S

Thank you Dave. You what I like about this site? The fact that everyone takes the time to answer when I have dumb questions.

Orsonoce · May 23, 2012

L.A.B. said:
Stillreel said:

Trying to determine how to wire the rectifier. At which points do the leads attach? Does it matter? I've got the red (ground) off the top fitting, but no indication for the remaining BLUE/BROWN (Negative charge NU), GREEN/YELLOW (Alt. GY) and GREEN/WHITE (Alt. GW).

Click to expand...

Connect the brown/blue (not blue/brown) to the centre rectifier terminal (on early Commandos it was brown/white as shown in Dave's photo).

Green/yellow and white/green (not green/white) can go to either outer terminal.

Is there no RED wire connected to the connector close to the central bolt (see pic above)? I got a spare red wire in that area which I thought went there...

L.A.B. · May 23, 2012

Orsonoce said:
L.A.B. said:

Stillreel said:

Trying to determine how to wire the rectifier. At which points do the leads attach? Does it matter? I've got the red (ground) off the top fitting, but no indication for the remaining BLUE/BROWN (Negative charge NU), GREEN/YELLOW (Alt. GY) and GREEN/WHITE (Alt. GW).

Click to expand...

Connect the brown/blue (not blue/brown) to the centre rectifier terminal (on early Commandos it was brown/white as shown in Dave's photo).

Green/yellow and white/green (not green/white) can go to either outer terminal.

Click to expand...

Is there no RED wire connected to the connector close to the central bolt (see pic above)? I got a spare red wire in that area which I thought went there...

If your harness has a red earth/ground wire with a spade connector then yes, connect it to the earth/ground tab of the rectifier. Stillreel said he had already connected the ground wire so I didn't bother mentioning it.

komet · May 23, 2012

"I've got the red (ground) off the top fitting."

DogT · May 23, 2012

The bottom and top terminal are the same connection, that is, ground or earth. You can connect red to one or the other or both. Mine was originally connected to the bottom as shown and the top one is pretty close to the seat pan, so figured it wasn't worth messing with.

Dave
69S

Rectifier wiring

Stillreel

DogT

L.A.B.

Moderator

Stillreel

Josh Cox

sole survivor

DogT

sole survivor

Orsonoce

L.A.B.

Moderator

komet

DogT

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