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On 11 Dec 2003 at 16:52, jeff ward wrote: > I am doing some wire chasing here, the book states that on the fuel > pump relay itself, if I am not recieving 12v, to TERMINAL 86, to " > find the open circuit and eliminate it." Also, I have constant 12v. > coming into the center terminal, even when the key is out. My question > is, wha the hell does does " find the open circuit and eliminate it" > mean, and should I have constant power to that center terminal?? The relay takes power from the fuse box and passes it on to the fuel pump when the relay is turned on. The 2 wires in the plastic plug turn the relay on; they supply the relay coil. Of the other wires, one comes from the fuse box, and I THINK this wire is hot all the time. A second wire disappear thru the firewall and goes to the pump. This wire should be hot only when the relay is on. The relay should be on any time the engine is in motion, or within 1 second of just having the key turned on or the engine stopping. 70-73 AT cars have a third wire which runs from the relay to the aux air regulator. This wire gets power at exactly the same time that the pump gets power. When they say to "find the open circuit" they mean to find the break in the circuit that is keeping power from getting to the relay. Does this answer your question? -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org