Tweet
I've been diagnosing my fuel pump not coming on when I turn the key (1994 Firebird 3.4) and I think I'm not understanding the fuel pump relay properly. I found in this thread while searching the forums about the wires to the relay.
http://forum.camarov6.com/showthread...uel+relay+wire
With a test light, I tested the power that controls the relay by turning on the key and that worked (green wire to black wire). It comes on for a couple of seconds, how long the pump should prime, and it disconnects. I couldn't get power going through the other two wires (pink and gray). I checked the PCM fuse, #5 and that's ok. On the relay, there's a little map showing pins 87 and 30 as the switch (pink and gray wires) and 85 and 86 as the relay control (green and black). Should I see power when I connect 87 and 30? Even with the key turned, I don't get power. I must not understand how relays work.
http://forum.camarov6.com/showthread...uel+relay+wire
With a test light, I tested the power that controls the relay by turning on the key and that worked (green wire to black wire). It comes on for a couple of seconds, how long the pump should prime, and it disconnects. I couldn't get power going through the other two wires (pink and gray). I checked the PCM fuse, #5 and that's ok. On the relay, there's a little map showing pins 87 and 30 as the switch (pink and gray wires) and 85 and 86 as the relay control (green and black). Should I see power when I connect 87 and 30? Even with the key turned, I don't get power. I must not understand how relays work.
Comment