Wire from battery to alternator issue
5 posters
G3GM :: G3 Tech :: Electrical
Page 1 of 1
Wire from battery to alternator issue
Hey guys, I'm working on the 75 Monte, and notice a wire from the battery to the alternator, which I believed was just for "direct charging" to the battery, as neither of the other Montes of mine have this connection. I decided to take it off, and found that the car will not start without it, now I'm confused. Anyone know why it would HAVE to have this wire in order to have any power and start? I have ZERO power without this connection.
JiMi_DRiX- G3GM Enthusiast
- Street Cred : 3
Re: Wire from battery to alternator issue
that wire goes to the fuse block i think. the others have a wire from the starter up to the fuse box.
just my thought
just my thought
1973 454 MONTE- Donating Member
- Street Cred : 36
Re: Wire from battery to alternator issue
Can you post a picture or describe where on the alternator and to which post on the battery? It sounds odd.
Alternators (typically) have three wires: one large and two small. The two small wires go to the dash warning light and to the ignition switch so the alternator can "read" the system voltage and regulate its output. The large wire runs either to the main post on the starter (earlier cars) or the positive terminal on the battery (later cars) and is for supplying the voltage to the electrical system as a whole while the car is running. Disconnecting the large one should only cause the symptoms of a dead alternator: battery is used for everything until it drains. It shouldn't keep the car from starting unless the battery was dead to begin with, in which case it shouldn't start with the wire in place, either, since the battery starts the car.
Alternators (typically) have three wires: one large and two small. The two small wires go to the dash warning light and to the ignition switch so the alternator can "read" the system voltage and regulate its output. The large wire runs either to the main post on the starter (earlier cars) or the positive terminal on the battery (later cars) and is for supplying the voltage to the electrical system as a whole while the car is running. Disconnecting the large one should only cause the symptoms of a dead alternator: battery is used for everything until it drains. It shouldn't keep the car from starting unless the battery was dead to begin with, in which case it shouldn't start with the wire in place, either, since the battery starts the car.
thatfnthing- Donating Member
- Street Cred : 65
Re: Wire from battery to alternator issue
Look like this wire? When I got my car it looked like this with a Batt cable connected to the exhaust manifold via one of the normal bolts. I have seen this done on top of the alternator also. See top arrows in the pic. I don't know if that's how it's supposed to be but I was able to start the car & run it.
77mali- Donating Member
- Street Cred : 62
Re: Wire from battery to alternator issue
If I'd have to guess, someone didn't connect a battery feed off the starter post to feed the dash and that was their way of providing a positive feed from the Alt. to the switch.
? maybe a bad fusible link wire at the starter, by the way that pic is kinda scary !!!!
? maybe a bad fusible link wire at the starter, by the way that pic is kinda scary !!!!
2fat2fly- Donating Member
- Street Cred : 2
G3GM :: G3 Tech :: Electrical
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum
Sun Apr 14, 2024 9:11 pm by Limey SE
» 76 Laguna parked in 2002
Sun Apr 07, 2024 1:32 pm by Limey SE
» El Camino/Sprint LH Aftermarket Quarter Panel FOR SALE
Thu Apr 04, 2024 12:58 am by relic7680
» dashes
Tue Apr 02, 2024 7:40 am by 454fourspeedss
» Thanks for having me
Wed Mar 27, 2024 7:25 pm by 77camino
» 77 elco SS
Tue Mar 26, 2024 4:35 pm by Whisperer
» 3-g cars in Finland
Tue Mar 26, 2024 11:33 am by Finn Monte
» Stainless brake lines
Mon Mar 25, 2024 4:37 pm by Joe73
» New chassis for my 73
Sun Mar 24, 2024 9:39 pm by g3chevy / Mr Pontiac
» 1973 Chevelle SS, 350, 4spd. build
Fri Mar 22, 2024 4:21 pm by Joe73