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acudr's avatar
acudr
Explorer
Dec 19, 2015

VSR Batt relay question

I have a northstar camper and I am changing out the vsr relay,

I thought I had it connected correctly, but not so sure now.

Camper is on the truck, and after running the truck for a short while (5 min), I was checking some other electrical issues (running lights not working) and I saw the little red light on the VSR and -1.4 amps being drawn after the truck was turned off. I put this in last month and have not checked and wondering if I did wrong.

So... I am trying to figure out how this thing should be connected and should there be any draw when the connected truck is not running. '

Where it is getting sticky is I have 2 black wires. I don't know which one should be connected to the red post. The both seem to have volts when I check each against the ground.

How do I know which is from the truck and which the camper, or am I thinking about this all wrong.

Thanks in advance.
Truck Campers
  • KD4UPL's avatar
    KD4UPL
    Explorer
    Dec 20, 2015
    What brand of VSR do you have?
    Mine is from Blue Sea. It, like most, is simply looking at battery voltage. A battery's voltage rises when under charge. It slowly falls when the charging source is removed; it doesn't drop instantly.
    If your relay is set for, say, 13.2 volts it will stay connected for a while with the truck off. It takes a bit for the voltage of both batteries to drop below the threshold.
    Do you have a manual? Have you connected the ground wire to the VSR properly?
  • acudr's avatar
    acudr
    Explorer
    Dec 20, 2015
    So I have distinguished which of the 2 black wires comes from the truck and I have attached that to the post with the red dot. (I turned on the truck and the voltage of one of the wires increased)

    With the truck on, the battery did not show charging, I think because it is already charged. Now when the truck is off, the red light on the vsr is still on indicating energy is going somewhere. Back to the truck? Or is it that the VSR is still energized? ,4 amps are being used when with nothing attached it should be .03.

    Still confused if I have right or not.

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