I had a local trailer supply shop install a Drawtite hitch & wiring some time ago, but just tried for the first time. I recently bought a trailer & found that there is a problem with the wiring on the car (I tried another known good trailer). The shop installed a Drawtite Modulite 18187 power module converter. IPD says that's the correct module to use. The shop says that the box may have gone bad & they will fix it. I'm affraid that they don't know their way around a Volvo & may make it worse. Is there something thats different about 93 945 that I can clue them in on?
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