MAD Wiring with Autometer Voltmeter already installed
The MAIN thing with the MAD mod is to reduce the current in the old ammeter circuit, as the alternator "used to go" From alternator.......charging wire.....IN THROUGH bulkhead BLACK.........(branch off to feed loads, welded splice) through ammeter.........BACK OUT bulkhead connector RED ........... and through fuse link............and back to battery
This is not necessarily "electron flow" this is the functional path
So what you want to do is to reduce the load through the bulkhead. If you turn the red and black into parallel supply paths AND ELIMINATE the battery charge path, then the current in the bulkhead is reduced dramatically
Therefore if you run a jumper from the alternator to the battery (starter relay) then the battery charge current will go direct to battery, and the two (RED and BLACK) bulkhead wires will now only supply current to feed interior loads in the passenger compartment
THE ONE THING you need to keep in mind with this is.........the fuse link is no longer a protector, and the alternator will not be fused, either. It would behoove you to put a large fuse / fuse link in the new charge wire, and to fuse the old black alternator wire as well
Catalog
Follow along above.........If you jumper from alternator to battery, not only is that path "not fused" but now the black charge lead runs into the car and supplies power into the car "along with the red". The RED is still fuse link protected, but if there's a jumper, neither it nor the black charge wire are now fused, NOR ARE ANY OF THE LOADS coming off the welded splice
The MAIN thing with the MAD mod is to reduce the current in the old ammeter circuit, as the alternator "used to go" From alternator.......charging wire.....IN THROUGH bulkhead BLACK.........(branch off to feed loads, welded splice) through ammeter.........BACK OUT bulkhead connector RED ........... and through fuse link............and back to battery
This is not necessarily "electron flow" this is the functional path
So what you want to do is to reduce the load through the bulkhead. If you turn the red and black into parallel supply paths AND ELIMINATE the battery charge path, then the current in the bulkhead is reduced dramatically
Therefore if you run a jumper from the alternator to the battery (starter relay) then the battery charge current will go direct to battery, and the two (RED and BLACK) bulkhead wires will now only supply current to feed interior loads in the passenger compartment
THE ONE THING you need to keep in mind with this is.........the fuse link is no longer a protector, and the alternator will not be fused, either. It would behoove you to put a large fuse / fuse link in the new charge wire, and to fuse the old black alternator wire as well
Catalog
Follow along above.........If you jumper from alternator to battery, not only is that path "not fused" but now the black charge lead runs into the car and supplies power into the car "along with the red". The RED is still fuse link protected, but if there's a jumper, neither it nor the black charge wire are now fused, NOR ARE ANY OF THE LOADS coming off the welded splice
