The Radio Information Board

Sounds like you may be right, Birken....however, I don't have the service manual so I don't have any way of knowing which pins are TxD, RxD, and ground....can anyone with a service manual for the TK890 help here?

The KPG43 is used for programming the TK690/790/890 series. Assuming they are programmed through the mic connector, the connector is round with 14 compression-type contacts and has a special long shank screw to fix it to the mobile radio's front panel.

Like the subject says, does anyone have either written information or a schematic of said cable that can be provided?

TIA for your help!