Dead after new new alternator belt

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

AdamandGreyson

Junior Member
Joined
Nov 2, 2025
Posts
14
Reaction score
8
Location
Martinsville IN
First Name
Adam
Truck Year
1983
Truck Model
GMC C2500
Engine Size
6.2 L Detroit
Yeah please post -anything would be super helpful, the alternator was put one previous to our purchase. Starter was done by my son and I. Clearly just used what was already there. Didnt know what was there was wrong! yeah that solenoid was there from previous owner as well!!
 

Sad Sack

Supporting Member
Supporting Member
Joined
Sep 3, 2024
Posts
2,623
Reaction score
5,493
Location
Nebraska
First Name
Goober
Truck Year
1985
Truck Model
C15
Engine Size
305
You must be registered for see images attach


Does this look like it could be an issue?? Enough to make the truck completely dead??
Looks like an Allen wrench is being used in some fashion by the starter...what up with that?
You must be registered for see images attach
 

Sad Sack

Supporting Member
Supporting Member
Joined
Sep 3, 2024
Posts
2,623
Reaction score
5,493
Location
Nebraska
First Name
Goober
Truck Year
1985
Truck Model
C15
Engine Size
305
You must be registered for see images attach

Post grounded out on that line that runs right behind it, the second photo is what I believe to be a fusible link, but asking because I am not 100% positive.
Whoa, grounded out on the fuel line, yikes.
 

Turbo4whl

Full Access Member
Joined
Oct 30, 2019
Posts
4,024
Reaction score
10,204
Location
Downingtown, PA
First Name
Wayne
Truck Year
1974
Truck Model
Jimmy
Engine Size
350
Clocking a 10SI. Remove the screws holding the back half of the aluminum housing to the front half. The stator needs to stay with the back half, it is hard wired to the rectifier. If you start to pull it apart and the stator (metal) between the to halfs sticks to the front, pry it out of the front half with a small screwdriver.

The rotor brushes will pop out of the holder, keep track of the two brush springs that can fly out. Make sure no rear roller bearing stick to the rotor, if any do put a little grease on them and put them back in the bearing.

Next reset the brushes, spring in, then the brush making sure the bush wire goes in the slot of the brush holder. To hold the brushes in place, there is a small hole in the back of the case. Starting with the rear brush, slide a clean thin nail or cotter pin in, push in the other brush and slide the pin past that, now holding both brushes. A clean plastic spray can nozzle works well to hold the brushes too. Reassemble screws and pull out your temporary brush holder.
 

bucket

Super Moderator
Staff member
Moderator
Joined
Aug 3, 2010
Posts
35,111
Reaction score
43,667
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
Looks like an Allen wrench is being used in some fashion by the starter...what up with that?
You must be registered for see images attach

"Oh! So THAT'S where that went!"
 

HotWheelsBurban

Full Access Member
Joined
Mar 31, 2023
Posts
3,907
Reaction score
11,023
Location
Houston, Texas
First Name
Carol
Truck Year
1990
Truck Model
R2500 Suburban
Engine Size
350
Clocking a 10SI. Remove the screws holding the back half of the aluminum housing to the front half. The stator needs to stay with the back half, it is hard wired to the rectifier. If you start to pull it apart and the stator (metal) between the to halfs sticks to the front, pry it out of the front half with a small screwdriver.

The rotor brushes will pop out of the holder, keep track of the two brush springs that can fly out. Make sure no rear roller bearing stick to the rotor, if any do put a little grease on them and put them back in the bearing.

Next reset the brushes, spring in, then the brush making sure the bush wire goes in the slot of the brush holder. To hold the brushes in place, there is a small hole in the back of the case. Starting with the rear brush, slide a clean thin nail or cotter pin in, push in the other brush and slide the pin past that, now holding both brushes. A clean plastic spray can nozzle works well to hold the brushes too. Reassemble screws and pull out your temporary brush holder.
Yup I have done this a few times "back in the day".
Dad showed me how to do the basic tune up on the 10SI internal reg alternator/generator/Delcotron.
Most of the time, what goes out on them is the diode trio; replace that, the regulator and the brushes and holder, put a little bit of fresh grease in the end frame (rear bearing cup), bolt er back together and you're good....just remember to pull the brush stick out!
 

Latest posts

Forum statistics

Threads
48,412
Posts
1,066,763
Members
42,791
Latest member
406chevy
Top