A/C Compressor blowing 30 amp maxi

[Donald Mitchell]

Link to the manuals. https://www.gmt400.com/threads/88-98-service-manuals.43575/

 

[ShadeTreeMechanic]

According to the PDC picture, is the battery positive on the correct stud? At this point, I don’t know what anyone else has done before me and I wonder as to what factory setup is on this truck.

 

[ShadeTreeMechanic]

So I found this in wiring schematics. I think my battery positive is on the wrong stud. I’m going to move it to the lower stud towards the bottom of the box and see what happens. Fingers crossed.

 

[Erik the Awful]

We need somebody to sneak up behind you, poke you in the ribs and make "Zzzt zzt!" noises as you do it.

 

[someotherguy]

That's what I'm saying.. from factory both of those studs should be empty, and there only for accessories to attach, and each of those studs' circuits are protected by the two 30 amp m-a-x-i-fuses (dashes to avoid the forum censor.) If the battery is connected there, that's incorrect. A closer look at the factory manual as suggested would be wise as someone has been "at work" in there without benefit of proper guidance.

Richard

 

[PlayingWithTBI]

Yep, looks like you're back-feeding the entire panel through fuse "B"

 

[ShadeTreeMechanic]

So yup, someotherguy, PlayingWithTBI, sure was. B+ was on the wrong stud (Aux B) and essentially was running everything through it. With the AC out of commission, that 30A M-A-X-I apparently could handle it. Throw in draw from the compressor and that 30A said uh uh. She’s running continuously now with no issues. I have a black eye from one of the ice cubes that flew out of the dash vent. Now… just have to find where she’s leaking refrigerant from. On to the next chapter. Thanks everyone!!!