Works well so far. There were no instructions in the kit and it didn't state that a reverse polarity switch was needed for it to work. After a bit of homework I figured out how it works and then found a schematic for a reverse polarity switch (6 pin with on and off function). I installed this on a Corvette 86, you need a short battery cable to connect the positive battery post to the circuit breaker, then the original battery cable connects to the other large post. The two small pins and positive 5 amp fuse on the battery side and ground go to your switch position.
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