Charging system issue 84 GMC 1500

[Butch84]

Butch has a charging issue. 84 GMC 1500. Stock 305. Replaced the battery, alternator, and the plug on top of the alternator because it looked pretty much shot. Still not charging. Been told its probably a ground wire rusted out somewhere but don't know where to start. Any help is appreciated. Thanks

 

[1987 GMC Jimmy]

I'd suspect the alternator positive wire is either internally degraded and needs replacing, has burned out a fusible link that needs repairing, or the alternator itself wasn't good from the get-go. Do you know for sure the alternator is good? It's always good to check your grounds. Here's a picture. That cylinder head strap should be on the passenger side, by the way.

 

[Butch84]

Thats what I needed

Thanks Jesse
We had the alternator tested to be sure it was not defective, and tested good. That diagram gives me areas to look at. When I replaced the plug on top of the alternator, the positive wire looked clean at the end anyway. Very helpful thanks so much!!

 

[1987 GMC Jimmy]

I gotcha. Well, still look for burned fusible links and all the grounds to be clean and connected.