79 C20 Chev Suburban

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mgcwrnch

Junior Member
Joined
Mar 25, 2012
Posts
2
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4
Location
chico, ca
First Name
alan
Truck Year
1979
Truck Model
2500
Engine Size
500 cadilliac
Charging system not working. Not bad alternator.
What could be problem ?? Fuseable link ?. Where ?? Any wiring diagram available??
Thx 4 help
 

MrMarty51

Full Access Member
Joined
Oct 25, 2012
Posts
7,533
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9,399
Location
Eastern Montana
First Name
Martin
Truck Year
1978
Truck Model
K20
Engine Size
400
Fusable links to the starter mainly. Might be one off the alternator battery terminal.
You apparently have checked off the battery terminal of the alternator with the engine shut down, then again with the engine running to verify that the alternator is charging, using a multimeter ?
New parts does not necessarily mean good parts.
Welcome to the forum.
Your handle has MGC in it, do You own a MG C ?
 

handyman1425

Junior Member
Joined
Feb 9, 2023
Posts
2
Reaction score
4
Location
Midland SD
First Name
Wallace
Truck Year
1977
Truck Model
K10
Engine Size
350
sometimes the battery posts corrode between the clamp and the post. I call this black post. it will start with a jump or a battery charger but not on it's own. And will charge higher on the gauge because it's struggling fo make the connection. I hope this helps as iv'e seen so often people get charged for a new battery when there is cleary nothing wrong with there old one.
 

Mr Clean

Super Moderator
Staff member
Super Moderator
Joined
Aug 18, 2010
Posts
9,886
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8,619
Location
North East Texas
First Name
Shawn
Truck Year
1982 & 1985
Truck Model
K10 Extra Cab w/ Proper SWB, & 85 K5 Blazer
Engine Size
454 BBC, & 383 Stroker
:welcome:
 

MrMarty51

Full Access Member
Joined
Oct 25, 2012
Posts
7,533
Reaction score
9,399
Location
Eastern Montana
First Name
Martin
Truck Year
1978
Truck Model
K20
Engine Size
400
Fusable links to the starter mainly. Might be one off the alternator battery terminal.
You apparently have checked off the battery terminal of the alternator with the engine shut down, then again with the engine running to verify that the alternator is charging, using a multimeter ?
New parts does not necessarily mean good parts.
Welcome to the forum.
Your handle has MGC in it, do You own a MG C ?
No, I would love to own one of those too.
I’ll see if I can change it to a B.
 

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