Single click when I turn the key

Hi,

If you get one click from the starter, either the starter is bad, or you have a loose connection. Most commonly, a battery terminal is loose or corroded. Have you checked that? Also, when you installed the starter, is everything tight especially the main power supply on the starter?

Also, is the click coming from the starter motor? Was the starter tested before the installation?

I attached the wiring schematic below for the starter circuit. At the starter, there will be a heavy gauge wire and one that is smaller. The smaller one should only have power when the key is in the start position. The larger wire has B+ at all times.

Check to make sure the larger one does have power. If it does, have a helper turn the key to the start position while you check for voltage to the smaller wire.

Let me know what you find.

Joe

See pics below.