My aerostar' 1994 XLT all wheel drive won't start. I was at Oreilies auto to pick up a part .When I went to start the car all it did was click. Luckally I was able to remove the starter there . They tested it about 10 times just to check the average. It passed every time. They said the starter and selonoid were good I put it back in the car cleaning all the connections. The car started. I got home and sure enough It did the same thing. When looking at the front headlights, when I turn the engine over they completely dim out. I do hear a clicking at the selonoid by the battery where part of the red cable is attached to. For $13.00 I'm going to replace it with a new one when I can find a way to go get it . Am I on the right track or is there a fuse or something I need to check?