The NYPD detective accused of pimping out an underage girl with the help of his madam girlfriend pleaded guilty yesterday to charges of attempted kidnapping.

Cop-turned-convict Wayne Taylor, 35, will be sentenced next month to 3½ years behind bars along with gal pal Zalika Brown, 29, who also took a plea deal yesterday.

The two were busted in January after a 13-year-old runaway escaped from their apartment in Jamaica, Queens.

The teen told cops she'd been sold to the couple for $500 by another pimp.

Moments after pleading guilty to the felony, the 14-year veteran quit his job. An NYPD Internal Affairs Bureau detective was there to accept his resignation.