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UPDATE: Ok guys I figured it out and I’m pretty embarrassed but oh well. The first thing you should do is test your fuses. And I did. I failed to see one was missing completely and did not realize it until I really stuck my head underneath. It caught my eye as I was plugging in my gp card. The...

the fuse at the bottom is 24v

There is not much heat at 3 minutes of starting.

Update I switched out the gauge cluster. Then put in a 4th alternator. Still no change. Still getting 24v to the fuse panel. At this point the only thing that has not been changed is the interior harness. After 5 minutes I’m still loosing voltage guage, 2gen light and low coolant light. Then...

I switched 2 rebuilt ones and they all are doing the same. Even had them tested.

hey man, I took apart the bulk head connector and everything looked great. I’m stumped on this problem. I have fixed lots of these trucks and know these things pretty well.

so I cleaned the whole gauge cluster, verified everything worked. Started the truck up. Everything was working perfect. After 5 minutes I loose, volt gauge, light bulb on start up, low coolant light. After I loose everything I tested voltage at the fuse panel and getting 28v. I’m starting to...

Update. i changed the 2 relays next to the starter relay and also the gen 2 diode. Nothing changed. I have my rear battery on a charger for now. I have no idea what’s going on. I may swap generators again and see if the problem goes to the other side. Idk I have replaced the whole system.

Fuse is good. Just switch it out or is there a way to test?

Ain’t nobody no nuffin?

When the truck is cold both my gen 2 light works and also my volt meter. After the truck warms up. Both of them stop working. Alternator is good And wiring is good. I’m thinking it has to do with the relays by the starter or the gen 2 diode behind the cluster. Anyone else have this problem?