As my alternator (OBD1) is showing signs of age, I was in the market for a replacement. I came across a high output OBD2 alternator which I read is backwards compatible with an OBD1 ECU. However, as I don't have the typical 4-wire connection, I'm a bit confused on how to wire it's not a direct cross match. See below for my current setup.


Pin 1: White/Blue
Pin 2: Black/Yellow
Pin 3: (empty)
Pin 4: Blue

Based on my setup, would I wire as follows?


Pin 1: Black/Yellow
Pin 2: (empty)
Pin 3: Blue
Pin 4: White/Blue

Thanks in advance!

 

BTW, does anyone know if pin 2 White/Yellow (OBD2: White/Green) is required. I found it's for ALT C (alternator control?) and read it's not required.

 

I have been having the same issue how do I kno what wires to what

 

The white/green and white/yellow,I'm confused on which pin these go to which pin

 

Bump

 

Referencing the photos I attached in the first post, the following has worked for me.

OBD II Alternator
Pin 1: Black/Yellow (Field Reference)
Pin 2: White/Green (Control)
Pin 3: ---
Pin 4: White/Blue (Indicator Lamp)

In reality, you only need Pin 1 & 2 for the alternator to function.