My husbands 1994 GMC Sonoma won't start. He thought it was the starter or seloid so he bought a new one.. that wasn't it. The lights all work. He can jump to the battery with a wire and it will start. He wants to check the ignition module but can't locate it. Can you tell me where it is located on this truck? It's a 2.2L engine

Here's what it should look like and cost:

http://www.partsamerica.com/ProductDetail.aspx?mfrcode=GPS&mfrpartnumber=EL152&parttype=194&ptset=A