I've had good luck with crimp on bullet connectors like you get at Radio Shack or any electronics parts store. Pull the connector off the EHA, it's the device bolted to the back side of the fuel distributor and the connector comes in from the US passenger side to the driver side. Make two wires with a male bullet connector on one end and a female bullet connector on the other end. Use these wires to bridge the connector and the EHA. Cut the wire that goes to the rearmost terminal on the EHA and connect the DMM probes to this wire to measure current.
That's about as cheap and easy as I can figure.