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The station first signed on the air on December 2, 1987, as W12BK, broadcasting on VHF channel 12; later that month, it moved to UHF channel 69 and accordingly changed its calls to W69BT. It originally operated as a translator of Chicago sister station WCIU-TV, which at the time was an independent station with Telemundo as a secondary affiliation. On October 18, 1995, W58BT (channel 58, now WBND-LD on channel 57) became the South Bend market's new ABC affiliate, after full-power WSJV (channel 28) ended its affiliation with that network to join Fox.[3] Due to W58BT's low-power signal which could not reach the entire market, Weigel then converted W69BT into a translator of W58BT to reach areas that could not receive an adequate signal as Weigel campaigned the FCC to increase the station's signal radius, along with establishing its pay-TV coverage.

After several years, those efforts were successful. As most of the market could receive channel 57 without issue, in October 1999, channel 69 became an affiliate of The WB with its own schedule. The station's callsign was changed to WMWB-LP (standing for "Michiana's WB").

After Weigel purchased WYGN-LP (channel 25, now CW affiliate WCWW-LD) in 2002 from 3ABN, Weigel chose to move channel 69's schedule, call letters, and WB affiliation to that station, which was closer to the majority of the channels on the South Bend television dial. Channel 69 then adopted channel 25's former WRDY-LP call letters. It later changed its calls three more times: first to WAAT-LP in 2004, then briefly to WCWW-LP in March 2006. From 2002 until 2004, it was once again simulcasting ABC programming from WBND-LP; after that, it returned to being an independent station, with occasional programming from the Sportsman Channel. 
gpt
W69BT, which originally served as a translator for WCIU-TV, became the ABC affiliate for the South Bend market in 1995. Later, it became Michiana's WB affiliate and changed its call letters several times before shifting to simulcasting ABC programming. In 2004 it became an independent station again broadcasting occasional programming from the Sportsman Channel.