75 Fusible Link Upgrade

[cruceno21]

Trying to find some information. Okay so I have searched... and I have read the stuff here (http://www.atlanticz...inks/index.html) and also looked at the 75 Wiring Diagram (attached). I have a couple questions.

For the 76 and up, it is clear in the wiring diagrams that the White wires all go to the starter for power. The WR ones go to their respective items. (each fusible link has a white wire to it, and a WR wire)

So now for my 75 (originally an auto but swapped to man) the alternator link (80amp) has two W wires going to it, and the ignition one (40amp) has both WR wires going to/from it.

The white wire from the starter goes straight to the 80amp fusible link. The two WR on the 40amp link both are going into the harness towards the cabin.

So which wires are the power to the links and which ones are the out wire that would be the ones coming out of the fuse block for the WR wires?

I have a Maxi fuse block, so I know to take one wire start from the starter to the power in, but which wires are my "out" wires? The inside of the fusible links are just looms right? So the other out white wire would come out the 80amp fuse. How do I figure out which of the WR wires should come out the 40amp fuse? Will it hurt anything if I wire them both into the fuse block (I have four slots) and since it is the ignition link see which one needs the fuse in order for the car to start?

Any help is appreciated.

75_schematic_diagram_withLines.pdf

[Zed Head]

If you have an ohm-meter or a test light you could test continuity from the "power out" wire from the 80 amp circuit to each wire end. The wire ends that show continuity should be the "power in" wires to the ignition and other loads, since they are fed from the main circuit. The left over ends are power out, to those loads.

Hope that makes sense. If you get a test light or ohm-meter and start poking around you will probably figure out what is connected to what, and where to put your fuses.

[cruceno21]

I posted this pic in another thread....

Are the wires that come in on one side coming right out the other side or do they cross at all inside the link box? So is the white wire in, the same white wire out (with the fuse in between)? If so clear the white one I know which one is bringing power in.

I have a test light, so in order to mess with it so I hook the battery up (I unlocked while I was messing with stuff) remove the fusible links and see which side of the terminal lights up the test light?

I am new to this electrical stuff... never done much more than a stereo install.

[Zed Head]

The wires don't cross inside the original fixture that was used for the original fusible links.

If you're not comfortable with rewiring you should just stick with the fusible links. They work well if the connections are kept clean as sblake01 said, in your other thread. Make sure you have the right ones in the right places, clean the connections and crimp them a little to tighten them up if necessary, get a cover for them to keep dirt and water off and you're good to go. If you rewire and make a mistake you could fry some wires and your car will be sitting for months.