What do these control? I just found then today playing around. I fund that the 30 amp maxi fuse is blown and i don't know what it controls.








Cover over fuses


Loose wire connects to fuse under battery tray, runs to relay

 

Year make model?

 

2001 Chevy blazer, sorry about that.

 

its all good, thanks, I am good on first gens, second gen people will come to help. I am not sure what that is for... What is the number that is listed under the "delphi" on there?
I know delphi as fuel pumps and injectors. Other than that... I am clueless.
We will figure this out LOL.....


Is there anything you have tried to use but has not worked? I am just trying to think of that 30amp fuse that is blown.

 

PA66 is the number. Delphi made all sorts of electronics for these trucks, I have not found anything that isn't working. I just randomly found it. I saw the assembly and took it out to see what it was and found the blown fuse.

 

Well a little detective work with the wiring and a few searches has revealed that the relay and fuse controls the AIR pump. the relay controls the pump turning on, the 30 amp fuse is the pump power, the 10 amp fuse controls the vacuum solenoid mounted next to the AIR pump.

 

Good work. What's the verdict? Did you replace the fuse and find any noticeable difference or anything?

 

I have not yet replaced the fuse. That will happen sometime next week. It is strange that considering the air pump must not be working that I do not have a check engine light showing up.