Posted by wore out on March 01, 2021 at 20:36:32 from (64.255.159.199):
In Reply to: alternator posted by gbs on March 01, 2021 at 19:36:18:
Quoting Removed, click Modern View to see
Inside the alternator there are 3 terminal studs on the rectifier, one for each "phase lead" from the stator.
If you are capable of opening up the alternator and successfully putting it back together including restraining and releasing the brushes as needed you can thread a lead wire inside to any one of those terminal studs on the rectifier, that will give you the AC signal the electronic tach is looking for. Use a couple of dabs of silicone sealant to keep your new wire out of trouble with moving parts inside the alternator and vibration.
If the pulley has been changed to a different size, obviously the tach won't read correctly.
(POSSIBLY if the original alternator was some brand other than Delco the number of rotor poles MAY be different, casing an incorrect reading, as well, there's a good chance of no issue there.)
If you want to get fancy, kits are available to install a stud like the factory did.
The stud kit installs in an existing hole near the alternator's output connector.
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