Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Is this the ABS #33 60a fuse in the underhood fuse block?
if so, here is that wiring diagram,
It says it runs the abs pump.
Can you unhook the abs pump?
If the fuse still blows with it unhooked, then there is a short in that wire/circuit, because that abs pump is the only thing on that circuit.
If not perhaps the ground G304 is bad.
Are you putting in 60 amp fuses?
You might want to see if there are any codes in that brake module or pcm/bcm.
G304 is located on the outside of left frame rail, near electronic brake control module. Unbolt it, clean the metal and retighten it and see if the fuse blows now.
I don't see an ABS fuse in that fuse box. Are you sure it's not called a "brake" fuse, #51, it's a 10a.
If so here,
It was in that other diagram also.
That's odd, in one diagram it says that brown wire goes to the pcm and the other diagram it says that brown wire goes to the ebcm.
Did you clean that G304 ground yet?
that is not what I am reading. That is not the ground for the 4wd.
was this a new ecbm you installed?
let me see if there are any tsb's about that. backing up here, did you say you cleaned the g304 ground? Also, why did you think the 4wd was also grounded there? I might be looking at the wrong diagram if you can prove that.
I found this tsb which says "ensure a good connection for the battery cable to frame ground. It is possible for this ground to cause similar symptoms with the ABS" as well as making sure the g304 is a good clean ground.
What about the ground between the battery cable to frame ground, did you clean that one?
I am stumped. I don't know what else to check. You don't have o be out $38, that was just a deposit, you can get that back if you ask.