Builds 1969 FJ40 named Mavis

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She moved under her own power today, but unfortunately only in low. And the clutch appears to be doing nothing.

Since the clutch worked when first installed, I'll observe to see if it's still engaging.

Good news is I think I've figured out the vacuum switch for low/neutral/high and the Front Drive thing.
 
Have you bench tested both of those with some jumper cables yet?
 
I have a ground cable running from the starter to frame. I'm checking my power wires and they look good.

Crap like this can discourage a guy. Pausing for the night and having a tot of Laphraoig.

At least the external hatch handle now works-ish, though the passenger side top panel is bent out of shape enough that the latch on that side "just" engages.

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Jumper cables and a screwdriver 🪛
 
Just make sure that you're standing on it or it's secure somehow, like a vise.
 
Funny; I'd forgotten the screwdriver thing.

Tried it on both starters, and they work fine.

Tried it on the new starter while mounted on the engine, and it just clicked like mad.

Acting like a stuck motor, but the motor ain't stuck.

Tomorrow when I'm not as mad, I'll install a jumper from power to keyed power and then jump it by putting on the battery negative, to see if the issue is with the keyed power circuit.

Since the original problem started after several successful starts and a few attempts to start it in 4 lo to get it back into the garage, (don't judge me) I highly suspect the keyed power circuit.
 
If the unit clicks but doesn't start the engine theres a good chance the plunger in the solenoid isn't making good contact with the electrodes which it needs to bridge in order to put current to the motor.
That's how Nippondenso starters fsil.
If you were closer I'd offer to rebuild it, I work at one of the last starter and alternator rebuild facilities in the USA and we stock everything for those units.

If you just bought it, take the cover plate off the solenoid and inspect the contacts.
If you over tighten them they won't make contact. Starter will throw out the bendix and may even turn on the bench but won't get the power to actually crank that big ol motor.
 
If the unit clicks but doesn't start the engine theres a good chance the plunger in the solenoid isn't making good contact with the electrodes which it needs to bridge in order to put current to the motor.
That's how Nippondenso starters fsil.
If you were closer I'd offer to rebuild it, I work at one of the last starter and alternator rebuild facilities in the USA and we stock everything for those units.

If you just bought it, take the cover plate off the solenoid and inspect the contacts.
If you over tighten them they won't make contact. Starter will throw out the bendix and may even turn on the bench but won't get the power to actually crank that big ol motor.
So what am I looking at here? What's overtightened?

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Dang. I actually fixed a thing.

I loosened both copper terminals, which were cranked on there hard, which tilted the contacts, and retightened them to a lesser torque, while ensuring the contacts stayed level. Popped it on the rig and it fired up right away.

If you look at the contacts, you'll see the output has uniform arcing while the input has 1 or 2 very slight pits.

Instead of returning my core starter to Toyota, I am motivated to rebuild it with me new found knowledge and put it on Zeke, as he has an el cheapo direct drive starter right now.
 

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