Fuse boxes and alternator not shutting off

AHOGG79

MEMBER
1993 GMC C1500
4.3L
6 CYL
2WD
AUTOMATIC
1 MILES

The alternator is staying on after you turn off the truck.
it's making beeping noise and is draining my battery I have replaced the same battery 3 times. How many fuse boxes does my truck have?

Thursday, September 24th, 2015 AT 10:36 PM

1 Reply

HMAC300

MECHANIC
48,601 POSTS

There is only one fuse box, you have a draw it could be abad alternator diode bridge causing the problem. Disconnect the large hot wire and see if the draw stops. You can go to how to repair diagrams electrical battery item 9