New to me 1998 Blazer 4dr 4wd. I have a no start condition. I have no fuel pressure at the Schrader valve. Engine cranks but won't start. Iswitched the relays (Horn & Fuel pump)in the main fuse panel underthe hood. Still nothing. I don't hear the pump come on when I switch on the
ignition. Searched the froums and I tried the banging on fuel tank tip, but't that didn't work.
My question is, before I drop the tank and replace the pump, I read about a red wire that I can
hook power to that bypasses the relay and see if the pump comes on. I cannot locate the "red wire"
Can someone please give me and idea where it may be and also did I miss anything before I drop
the fuel tank? Thanks

 

Bypassing the relay may or may not give you what you expect. Most often, this is a faulty pump, but could be caused by a broken wire to the pump. You really need to pull the electrical connection off of the pump and test the main power/ground leads. If you have power at the pump, then the pump is the problem.

 

Also, check the fuse, not just the relay, just incase...

 

i agree with the previous my buddy had that problem with his blaze it turned out to be the pump good luck

 

Thanks for the info. If I can get to the connections at the pump I'll check for power.
If not, I'll just replace the pump, as it's probably the original.

 

more than likely its originall alot of mine is and alot of everyone i know has all original parts. good luck with the repair