66 barracuda - wire sparking/heating up

Agree there is a short.
Its probably not in the ammeter, but the ammeter will tell you if its downsteam of the meter.
Look at the meter before connecting and then after connecting the battery.
Or better yet, have someone look at hte mete rwhile you briefly connect it.

1664461378681.png
When the battery is connected, there should be no spark and no current flow unless somehting is turned on (eg dome light).


Fusible link protects when there is a severe short downstream of the link.
For example the headlight feed pinched by the metal
1664461494647.png