Altenator - External reg --> Internal reg

[Invid]

Just about to embark on the conversion from the crappy 2T Alt with external reg to a 2TGEU alt with internal reg (that came with the halfcut). Now if my research is correct there are 4 wires that need to be connected (sourced from here http://autoshop101.com/forms/h8.pdf):

B fused wire to Battery
S fused wire to Battery
IG to Ignition switch
L to Charge light

So to convert from the old Alt I'll need to run a new wire for S but the rest of the wires can come straight off the old loom, and dispose of all the excess wires. Is this correct?

[oldcorollas]

yup.. does the new alt have an S wire?
some alts internally sense, and some use the IGN for sense....

does it go directly to the battery on the halfcut? (still makes sense as the sense wire won't heat up and change resistance like the charging wire can)

oh, and run a new fat cable for the B wire.

[Rcubed]

hey Seb,

B to battery
and the other three go to the plug for the old regulator.
W - Voltage sense
Y/W - CHG light
Y/B - Ign

pictures
Regulator Plug end
Regulator plug from above.
Green, bLue and Black/Yellow above
White, Yellow, White/Black below

also check this
The Witzl's Quick Guide to Wiring an Internally Regulated Alternator

you may need to use a relay for the chg light cct if it is always on when running and off other times.

[The Witzl]

hey Seb,

B to battery
and the other three go to the plug for the old regulator.
W - Voltage sense
Y/W - CHG light
Y/B - Ign

pictures
Regulator Plug end
Regulator plug from above.
Green, bLue and Black/Yellow above
White, Yellow, White/Black below

also check this
The Witzl's Quick Guide to Wiring an Internally Regulated Alternator

you may need to use a relay for the chg light cct if it is always on when running and off other times.

correct... but im not sure about the relay - ive never needed to use one before?

Read my guide anyway, thats why i wrote it

[Mos]

correct... but im not sure about the relay - ive never needed to use one before?

Some 1G-GTE alts are "backwards".

Mos.

[wilbo666]

Some 1G-GTE alts are "backwards".

Mos.

Yah, you may recall JCMO and his 'Everything is OK Alt Light'...

Cheers
Wilbo

[Rcubed]

the 2T-GEU alternator i had came fm a Corona and was 'backwards'. when i wired it [in 1990] i needed a relay to reverse the signal.

[Invid]

Hmmm, I spent a half hour cleaning the altenator only to discover the shed fairys seem to have replaced my Internal regulated altenator for a standard ext reg altenator while I wasn't looking. OK. now where did I place that altenator...

ps. Witzl - I searched for about an hour and never ran accross your guide. Poop!