Join Date: Jun 2010
Location: Pac NW
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Make sure ground on starter is solid. Also, make sure all contacts and cables to it are solid and not rusted.
try jumping starter on the vehicle.
If it turns, then it is OK.
Test voltage supplied to starter.
Unfortunately, then you have to investigate the entire path from battery to starter.
If your vehicle has main relay, you may want to start there.
Ignition lock is next suspect.
Corroded battery terminals, loose cable connections, are to be checked. Unfortunately, Toyota likes those modular plates for cable terminals, so sometimes the battery clamp is Ok but where you have cable connected to the plate, between terminal and plate it gets corroded and is not plain view.
You starter does not get enough power to turn, so something is preventing it from getting there. Gap, corrosion. Bad negative.