Volvo: starting problem, fuel pump relay, fuel pumps
QuestionAfter working on the instrument cluster I cannot get my 1981 240 to start. It acts like it wants to start, but seems like it is not getting any fuel. I have checked to see if I disconnected the fuel pump relay, but it is connected. I took the relay out of it's case and checked it, it looks OK. How can I tell if it is in fact OK? Is there more than one relay? I checked the fuses for the two fuel pumps, they are both good. What else can be the problem? There is plenty of gas in the tank.
AnswerThere is a way to bypass the relay to see if the pumps work. You have to short two of the terminals on the connector to the relay. I can't remember which ones it is, but you can take a wire and pick terminals until you hear the pumps. If none of the combinations work, then go apply 12 V directly to each of the pumps to make sure they work. If they do, then I would start looking for a short between the relay and the pumps. In an 81, you have the possibility of a rotted wire harness, which means you can get random shorts like this. Getting a Hayne's manual at Pepboys to get the circuit diagrams for the car might be a good idea in this case. Good luck!