[WinMod70]

Varnished windings? I’ve been tinkering with cars/trucks for close to 40 years. Never came across the dreaded varnished windings in that time.

[whodathunkit]

the dreaded varnished windings...

Enameled magnet wire, used for many years for alternator windings, starter motors, lighting and starting relays.

Short out one loop with a high current pulse and the rest of the windings are useless in that device.

[PA Engineer]

Varnished windings? I’ve been tinkering with cars/trucks for close to 40 years. Never came across the dreaded varnished windings in that time.

Then you were not tinkering with cars with generators, alternators, and starters.