Fuel Pump Relay Problem
Fuel Pump Relay Problem So I am getting the car (2000 Corvette) back together and I attempted to energize the fuel system to verify it working and check for leaks before I put the rest of the car back together. This is where I discovered the problem. The fuel pump relay is not energizing.
Here is what I have done to troubleshoot it:
- verified pin 85 is grounded
- verified pin 86 has voltage - 11.2 vdc
- verified proper voltage going from fuel pump fuse is going to pin 87 on the relay - 11.2 vdc
- I can connect the relay directly to the battery via pin 85 and 86 and the relay solenoid energizes
- if I manually work the relay the fuel pump does turn on
- when I plug the relay in and check voltage thru the relay I have 0 vdc going thru pins 86 and 86
I do not want to put the rest of the car together until I get this issue resolved. Anyone have any ideas?
Here is what I have done to troubleshoot it:
- verified pin 85 is grounded
- verified pin 86 has voltage - 11.2 vdc
- verified proper voltage going from fuel pump fuse is going to pin 87 on the relay - 11.2 vdc
- I can connect the relay directly to the battery via pin 85 and 86 and the relay solenoid energizes
- if I manually work the relay the fuel pump does turn on
- when I plug the relay in and check voltage thru the relay I have 0 vdc going thru pins 86 and 86
I do not want to put the rest of the car together until I get this issue resolved. Anyone have any ideas?
UPDATE:
I can get the relay to energize if I use the ground pin and a jumper wire from the battery, but if I use the power pin and a jumper from the battery it will not. This puzzles me because I get battery voltage at the power pin....
I can get the relay to energize if I use the ground pin and a jumper wire from the battery, but if I use the power pin and a jumper from the battery it will not. This puzzles me because I get battery voltage at the power pin....
Ok, I feel like a complete tool now....I completely forgot the pump only cycles on briefly when the key is turned on....and my fuel pressure gauge is telling me that is exactly what it is doing....sigh....
