Hello to everyone. Here is my problem: I have a 2003 toyota corolla that just one day stop cranking over. I've ran a lot of different tests, here are the things I've checked.
1. New Battery voltage=12.4 v when checked
2. Alternator checked at autozone=fine
3. Starter motor checked at autozone=fine / ran a second test bench test starter motor was good. I think the solenoid may not work, but was confirmed by autozone that is does. If solenoid is out should there still be some type of noise?
4. Changed the starter switch
5. Cleaned and checked the terminal cable running to battery and ground / good connection
6. Checked the cable from battery to starter solenoid got voltage, but when cranking over no current change.
7. Changed the fuse 100A to the starter motor.
8. Checked the yellow wire which is the alternator wire no voltage.
9. Checked the white wire which is constant 12v = fine
Could it be ecm or neutral safety switch? Please help any ideas? Any other tests I need to run? What about tach wire? There was an alarm system hooked up to the car at one point, but when battery died I could not bypass the valet due to no button on switch. Poor job done by alarm guy so I took it apart and reconnected the red wires under the dash to the ignition. The power that was being pulled from the alarm was tapped into the tach wire instead of the constant 12v maybe that could have done something to the ecm? Please anyone HELP! this has been very draining.