Hey all just trying to workout what the 3 pins go to on the alternator? As I don't have the original s13 batterie side loom, I gather the big lug on the back of the alternator is to go too the + batterie? I looked on plms at there diagram but it doesn't tell me whats what on the alternator

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-1969 1600 SR20

Two go to the battery, and the other to the charge light on the dash

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'...to 180B or not to 180B, that is the question...'

The Datto...
'74 610 180B
SR20DET on 18psi and E85. 220kW.

so theres no earth? any idea which is which?

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-1969 1600 SR20

http://www.plmsdevelopments.com/rhs_wiring.htm

This is how I did mine, works perfectly.

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'...to 180B or not to 180B, that is the question...'

The Datto...
'74 610 180B
SR20DET on 18psi and E85. 220kW.

Big fat white one is your main charge line. Runs a 75 amp fusible link back to the battery cable.
The Thin white one is the sense line, and should run a 25amp (i'm pretty sure from looking at my fuse box lid) fusible link to the battery line also.
The thin white with red trace one is your charge light.

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Ongoing Project: 1972 Datsun 510 S13 SR20Det. http://ozdat.com/forum/viewtopic.php?f=33&t=17898
New Daily: D22 Navara (The new workhorse)
Retired 12/2016: MY98 Subaru Impreza RX
Previous Car: Restored Green 1972 Datsun 510, Hot L18

i just need to workout which is the sense wire and which is the charge light on the actual alternator, also i cant seam to find a spot to bolt the earth wire to the alternator?

_________________
-1969 1600 SR20

also can i run the wires like this instead of running the wires all the way to the batterie in the boot

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-1969 1600 SR20

Yes. That will be fine.

Check this link: http://www.ozdat.com/forum/viewtopic.ph ... ine#p31921

_________________
Ongoing Project: 1972 Datsun 510 S13 SR20Det. http://ozdat.com/forum/viewtopic.php?f=33&t=17898
New Daily: D22 Navara (The new workhorse)
Retired 12/2016: MY98 Subaru Impreza RX
Previous Car: Restored Green 1972 Datsun 510, Hot L18

Cheers mate that clears things up for me but 1 more Q there was a wire (white with reddish strip) it was originally on the main power feed lug on the l series alternator and it looks to run upto the fuse box. Would this be the sense wire?

_________________
-1969 1600 SR20

yes. that is correct. Hope this helps you.

_________________
Ongoing Project: 1972 Datsun 510 S13 SR20Det. http://ozdat.com/forum/viewtopic.php?f=33&t=17898
New Daily: D22 Navara (The new workhorse)
Retired 12/2016: MY98 Subaru Impreza RX
Previous Car: Restored Green 1972 Datsun 510, Hot L18

Thanks for your help:) I sussed what's what on the SR alternator. The top pin is the charge light and bottom is the sense. Now I just need to workout which wire is my oil pressure and which is charge

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-1969 1600 SR20