Question about 1995 Chevrolet Blazer
Do a continuity check on the power and ground wires to the pump. You'll need a spool of wire so you can cover the length of the truck. Make two wires about half the length of the truck and attach alligator clips to the ends of the wires you made. At the connector to the fuel pump, insert a straight pin into the slot that corresponds with the ground wire first, connect one end of the wire to this pin and the other to the positive lead of your ohm meter. Connect the other lead to the other wire and then connect it to the negative side of the battery. If you have less than 10,000 ohms resistance (really it should be less than 200), you have an acceptable ground connection. If not, you will have to find the break in the circuit and that could be very time consuming. Look for pinched wires, corrosion in connectors, loose screws, etc. along the circuit. To test the positive side, connect the positive side test wire to the output side of the fuse for the pump and the negative side into the relay's power slot. Again you should have very little resistance. If you have a high reading, there is a bad connection in the wiring somewhere. If you have no reading, there is a break somewhere. If this checks out fine, move the pos. test wire to the output side of the relay and move the neg. one to the power slot in the connector to the pump. If indeed your relay and fuse are good, you will find the problem in the wiring circuit. Have lots of patience and good luck!
Posted on Nov 20, 2009
Did you check with a test light the fuse has power and relay has power if so check the wire for breaks if no power is at the plug at the tank
Posted on Nov 20, 2009
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Posted on Jan 02, 2017
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