EBCM or ABS PUMP

[wishybone2]

OK I have a 2004 GMC Sierra

4WD 5.3 JL4 Brake system

 

Tried to bypass my ABS system... still cant get my brakes to work.. so I guess I will have to fix it the right way...

 

Before I couldnt get anything to bleed I had a pump motor circuit shorted... ABS

 

I put all new calipers... and a new master cylider. Bypassed the abs pump etc and cant get it to bleed still. (couldnt bleed it before because I couldn't run the automated bleed from the scantool)

 

So now my plan is to put all Copper (cupro) nickle lines and fix my ABS module...

 

Question is --- Is it the pump that bad or the EBCM... I see that many people rebuild the module and it seems to be a common problem. No one has spoke of the actual pump being no good.

 

Oh BTW - I cleaned the grounds on my frame under the door and it did not fix the problem..

 

Any one?

[gmtech4]

what codes where pulled from the EBCM?

 

are you willing to guess ?

[wishybone2]

pump motor circuit shorted... is what the scanner said... I forget the exact code...

[gmtech4]

good luck with your decision

[wishybone2]

OK so... No resistance in the pump.... just took it off... Service manual says to replace both bpmv and ebcm...

 

I take it that it burns the module out when that happens???

 

Salvage ones are everywhere... but it took me a while to find one that is JC4 compatible... Not JL4 as a said earlier