01 ls 4dr blazer I recently pulled out my headlamp power relay then when I put it back my fuel pump magically turned on and off several times no I have no headlights and my fuel pump will not turn on when key is turned forward to start no prime or nothing I have switched out relays and still no go . but thers the thing if I take apart the relay and click the two relays manually my fuel pump will come on and vehicle will start right up .
I have good spark new cap rotor plugs ,crank sensor all new within 6 months the relay for my lights and my fuel pump just wont work and the funny thing is I can put those two relays elsewhere and they will work fine for other things as in rear defrost ,horn and popping the back window and just my headlights don't work my park lights ,instrument cluster blinkers all work just no head lights and no running fuel pump unless its clicked on manually