Maxifuse Installation on a '77 280z

Note: This is the prototype installation. The actual kit comes with 4 metal screws that will attach it to the strut tower area.

Tools for kit install:

Procedure:

Disconnect battery's -Neg terminal.


Fuse box and fuses


The box next to the strut tower is a sheet metal rain guard. It covers the fusible links and voltage regulator.


Underneath are the fusible link covers. "Johnson & Johnson" medicine bottles!! Thank God for PO's!


Digging deeper... original covers and fusible links removed from side of engine compartment


I used an old 76 or 77 transistor module to make a mounting plate and used two existing 10mm bolts for the AC receiver dryer near the strut tower to hold the maxifuse box.
The standard kit comes with mounting sheet metal screws.
An optional aluminum mounting plate is available that is similar in design to the one above.


This is a blurry photo but you can see the 4 white with red stripped wires connected to the screw terminals in the bottom of the maxifuse unit. (one is about to be connected, I tried to photograph the stripped wire but a tiny LCD and auto focus get you every now and then. You can see the 4 white +POS wires going to the top of the photo.


To identify the Black 80A fuse location, use an ohm meter to measure the resistance between the "BAT" terminal on the alternator and the white with red striped wire.
The resistance should be less than 1 ohm. Install this wire in the most forward position on the maxi fuse box.


To identify the headlight fuse location, use an ohm meter to measure the resistance between the  wire harness headlight plug and the white with red striped wire.
The resistance should be ~ 1 ohm (This path goes through the steering column thus the crazy high resistance).


Here you can see how Nissan took one white main +12V power wire from the +Pos starter terminal, then they split it then split it again to make 4! The black tapped splices are factory!!! I just cut back the wiring harness wrapper to expose the crazy splicing.

I just snipped them off and also snipped the other end (white wire to starter +pos)


Here is the final product. The black with red stripe wire was from a gutted 200sx battery cable.
It goes directly to the +pos on the starter and replaces the white wires I mentioned above.


Here you can see the black with red wire route to the +pos on the starter


Installed. Green fuse in front is 60A (It should be 80A). The other Red's are 50A..
Note that 50A units work fine in all slots on a '77 280z.

 

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