Sure you can.

Get yourself some 12 guage wire and cut five pieces about 12" long. Strip off both ends. Twist the five wires together on one end. Remove the plug from the side of the glow plug relay. Insert one wire into each of the five sockets.

Carefully attach a jumper cable from the + battery terminal to the twisted group of five wires (don't let it hit the body!!).

Wait exactly 30 seconds.

Start the engine.

Remove the jumper cable and the jumper wires. Replug the relay.