Bob52 Posted August 19, 2015 Report Share Posted August 19, 2015 My Happijac's are working backwards for some reason. I pushing the up button on my remote and it goes down. Must have a safety switch on the slider because my jacks only work when my slider is out. It would be much safer if the slider was in when lifting.Model of jacks is 4150. Link to comment Share on other sites More sharing options...
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