These lights are always on, even after a reset. Is it a module ? Or sensor? The diagnostic is inconclusive so i am leaning on the experience here, which is top notch i would say!

 

You should get an ABS code. for that.

 

Typically is it an ecm issue, or what part should i be looking for?

 

I had the same symptoms with mine but the ABS motor would also not quit running. I ended up sending the ABS module in for repair and currently await its return. Without scanning it, I don't think I'd just blindly send it out for repair though. I went to autozoo and borrowed their scanner.

 

Thank you

 

A lot of times the issue is that the ABS module has a cracked solder joint on the connector pins. The "fix" is to just reflow the solder on the connector pins. Sometimes the problem is a relay on the circuit board, but not very often.
The only issue with doing the solder reflow is getting the cover off the ABS module, it is sealed. Requires time and patience to cut through the cover seal to access the circuit board.
Then do the solder reflow and just screw the cover back on in order to see if the problem is solved. If it is, then clean off the old sealant, apply some RTV, screw the cover down, re-install into Blazer and away you go.
Almost a $0 cost repair.

 

^^ That's the way you get the ABS light off. LannyL81 knows his stuff.

 

I've reflowed solder joints on a few ABS modules. The '96 iS10 s just sealed with a gasket, but once you get into it, you've got to pry the board out of a few clamps holding on heat syncs on components. On a '01 Isuzu Rodeo, the electronic part of ABS module just came off with some Torx fasteners and it was an easy job (or would have been if I hadn't stripped the screw heads). On a '98 C1500 Silverado, it required removal of the electronic part of the ABS module and then I cut the plastic weld around the cover for the ABS unit and then reseal it after flowing the solder. That one was pretty dicey as getting the top off was difficult and I hadn't seen any postings or videos of anyone who had done it before. On all of them, you didn't have to take any hydraulic lines off. Just unplug the electrical connectors and remove the electronics module. That is most likely the problem with the ABS light. The e-brake light is typically a different circuit and has different causes for it coming on.