Dash wiring guide (Tach and VSS), for tacho dash conversion.

Any thing and every thing ever asked about how to do an EJ conversion to an L series and MY. Includes Brumby and Coupe.
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L-Rex
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Location: Wollongong, NSW.

Dash wiring guide (Tach and VSS), for tacho dash conversion.

Post by L-Rex » Mon Oct 08, 2018 4:47 pm

With the help of my multimeter, a 12V power supply, some bench space, and the suggestions of other members,
I have started to definitively map out the 4-gauge tacho dash, and the standard non-tacho dash.

First of all the tacho wiring pin;

This is the PCB trace for the Tacho, marked "TA";
Image

It goes to this pin;
Image

And becomes the yellow wire on the round white plug Pin 3;
Image


Next, the Vehicle Speed Sensor;

The tacho dash I have may or may not be from an MPFI (I can't find a "check engine" light on it).
However, I have pulled it apart and can report that it definitely has the reed switch fitted into the speedo, which is definitely not present in the non-tacho dash.

One side of the reed switch gets an ignition positive feed via the steel jumper strip across the top of the cluster, via the small screw on the right.
The other screw on the left is the output pulse from the reed.
Image

The output side goes to a jumper;
Image

The feed then snakes its way around the PCB to another jumper labelled "RSW", which matches the "RSW" on the reed switch;
Image

and back out;
Image

and round to this pin;
Image

which attaches to this Yellow/Red wire on Pin 3 of the round black plug;
Image

Here are the final charts, if it's blank, that means it's not fitted or not used on these particular dashes/cars;

First, the 1992 GL automatic;

Image

Now, the tach dash from a Touring Wagon;

Image

As you can see, some of the colours match up, some do not...
Last edited by L-Rex on Tue Nov 27, 2018 12:52 pm, edited 2 times in total.
L-Rex

1992 L-Series Wagon, which used to be EA82 auto.

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henpecked
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Location: South Oz

Re: Dash wiring (Tach and VSS), also tacho dash conversion.

Post by henpecked » Wed Oct 17, 2018 12:23 pm

thank you for your work so far, really appreciated

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L-Rex
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Joined: Tue Sep 18, 2018 6:03 am
Location: Wollongong, NSW.

Re: Dash wiring guide (Tach and VSS), for tacho dash conversion.

Post by L-Rex » Tue Nov 27, 2018 12:53 pm

Hi all, finally got around to finishing the dash pinout mapping.

Original post has been modified to include completed pinouts.
L-Rex

1992 L-Series Wagon, which used to be EA82 auto.

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TOONGA
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Re: Dash wiring guide (Tach and VSS), for tacho dash conversion.

Post by TOONGA » Wed Dec 05, 2018 4:04 pm

thanks that is some great information.

TOONGA

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