usnretired92 wrote:
It is not a relay because it does not have any control wires. It looks like a like a diode to keep auxiliary power from feeding back to the battery. The arrow stamped in module is the key. Since you have a Freightliner chassie you need to contact Freightliner for info.
That's not an arrow. It's a simple curb between the terminals of the breaker to keep the connections from touching - a common characteristic.
OP, put an ohm meter across it to check continuity just use a light bulb connected to one end and connect the other end to the battery. You'll find it will have continuity no matter which direction you hook it up - proving it's not a diode.
BTW, just because it's cracked doesn't mean it wont work. As long as it doesn't get moisture in it and corrode it will function. If it does corrode inside then it will trip prematurely.
You don't need to contact FL for a replacement unless you want to spend about 10 times what it's worth. Just get the current rating off the side of it and go to NAPA or Oriellys ~ it's a $3 part.
