[PDF] INSTRUCTIONS - jegs 8. Now make one length of wire with a female end connector on one end and a female bullet nose connector on the other. Connect female terminal connector to relay terminal 5 and the female bullet nose connector to the pump motor black (-) side. 9. Now install vacuum switch clip connector onto the end of a length of wire. Make sure to crimp down Location of the vacuum pump relay - Volvo Forums Oct 22, 2011dan777 wrote:Thanks Juan, I've seen this diagram before, it shows the vacuum pump but I am looking for the electrical relay that controls the pump.I believe the way it works is this: the vacuum switch closes when the vacuum is low and energizes the relay that starts the pump.