When I got my 2006 Outback one of these Hopkins Hoppy units was already installed. It was left connected all the time and I never had any trouble with battery drain.

The trouble is that it always had issues with the right trailer light being stuck on all the time. I thought it was a short in one of the cables, but it isn't. I spent half an hour wiggling the wiring around and holding other sections of wiring still.

I eventually determined theright trailer light would work as intended, or be lit all the time, based on how I tilted the actual converter module. I made sure to test holding the cable still near the module, and cross-tested by wiggling the cable where I let it move further down while I held the converter module still. It's the converter module that's bad.

So I'm not sure if this is a good product or not. The brains is what shorted out, and I don't know when it happened or why.
When I got my 2006 Outback one of these Hopkins Hoppy units was already installed. It was left connected all the time and I never had any trouble with battery drain. The trouble is that it always had issues with the right trailer light being stuck on all the time. I thought it was a short in one of the cables, but it isn't. I spent half an hour wiggling the wiring around and holding other sections of wiring still. I eventually determined theright trailer light would work as intended, or be lit all the time, based on how I tilted the actual converter module. I made sure to test holding the cable still near the module, and cross-tested by wiggling the cable where I let it move further down while I held the converter module still. It's the converter module that's bad. So I'm not sure if this is a good product or not. The brains is what shorted out, and I don't know when it happened or why.