The Tekonsha Voyager # 39510 is a decent controller but it was one of the older models from Tekonsha so for a replacement I recommend checking out the Tekonsha Primus IQ # TK90160 which will plug in using the existing pigtail on your Voyager and is pretty intuitive to use.
Before you replace the controller though I do recommend checking the adjustment of your trailer brakes. There should be a slight drag when you freely spin the wheel. If there is too much drag or too little drag then... view full answer...