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Old 03-16-2015, 12:47 PM
Alec300SD Alec300SD is online now
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Join Date: Nov 2013
Location: San Mateo, CA
Posts: 1,159
Hi cho,


The wires from 1 & 2 connect to A with new ring wire connectors.
The wire from 3 connects to B with the spade connector (or new ring connector if the B on your new alternator doesn't have a spade connection).

The condenser spade connector on 4 goes to C.
The condenser mounting screw on 5 goes to D.

The extra ground connection cable goes from E to the body where the main ground cable from the battery attaches. Alternatively, the extra ground connection cable can go directly to the negative battery cable.

The extra positive connection cable goes from A to the terminal block (picture 1 on post 3). Alternatively, the extra positive connection cable can go directly to the positive battery cable.

I hope this is helpful.
Attached Thumbnails
DIY - AL129X alternator in a 1978 W116 300SD-alternator-wiring.jpg  
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78 W116 300SD 'Desert Rose' new as of 01/26/2014
79 W116 300SD 'Stormcloud' RIP 04/11/2022

Last edited by Alec300SD; 03-16-2015 at 06:48 PM. Reason: Typo
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