I'm hoping some fresh eyes could help.

I had my starter rebuilt and have replaced my battery and am having an impossible time resolving the issue. Here's what I've done:

- I pulled the starter and bench tested it (jumpers from negative to starter body, positive to post, 12V to ignition wire connection on solenoid); it turned
- I put it in the vehicle, connected all wiring except ignition connection, and ran jumper from positive terminal to ignition wire connection on solenoid; no response from starter.
- I pulled the starter and observed flywheel; turned manually with the fan - free rotation.
- With starter out, wired 12V to positive post, ran jumper to the other wire connection to the positive post that powers everything else, and ran jumper between the ignition wire and the ignition wire connection on the solenoid. The starter turned.
- I reinstalled the starter, wired everything; no response from starter when the key was turned.
- I wired just the cable from the battery to the starter and ran a jumper from the battery to the wire connection that powers everything else. The ignition wire attached as normal; no response from starter when the key was turned.
- I ran a jumper directly from the starter body to the negative post on the battery. no response from starter when the key was turned.

I feel like I've isolated everything and the only variable is the starter being physically installed. When the ignition is turned, there is literally nothing turning and the dashboard lights don't do the dim that would typically accompany the load of the starter.

I have checked the functionality with a voltmeter during this process. THere is juice going to the solenoid, there is power being provided from the ignition circuit, and the solenoid is activating to send roughly 12V to the starter motor. Something is happening between there and the flywheel.

Anyone out there able to think of something I'm missing? I'm at a total loss.