The fuse between the battery and alternator is a fusible link in the small wire that hooks up to the battery terminal along with the regular battery cable. It looks like a thick spot in the wiring. To replace, the cable must be replaced. .
Generally there is NO fuse between the alternator and battery.
You might have a bad battery, a poor connection between the battery and alternator, or a bad ground from the battery.
the voltage regulator is built into the alternator, check voltage at battery connections should be 14.5 volts
Remove the belt from your 1994 Chevy Astro Van 4.3 liter engine alternator. Remove the wiring harness from the back of the alternator. Remove the alternator retaining bolts. Reverse the process to install the new alternator.
have the alternator and the battery checked
?ignition control module/pickup
The voltage regulator is built into the alternator.
triple diodes in alternator are bad
Inside the alternator itself
usually you blow the diodes inside the alternator and it will not charge. hook it up correctly check all fuses with car running check the voltage at battery make sure it is between 13.4 and 14.5 volts if it reads 12 volts you need a alternator if not u got lucky
Alternator is not charging. Have it tested and/or replaced.
about 30 min to 1 hour .hope it helps