Truck power to trailer
One of the pins on the 7 pin connector is supposed to supply power to the trailer. Mine doesn’t seem to be working. If I measure the voltage at the battery, it does not go up at all when I connect t...
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waynefi wrote:
OK, I tried a couple of more experiments. The trailer has been plugged in for weeks.
Unplug, open the battery cutoff, let it sit for a few minutes. Voltage at battery 12.9. Connect the truck, close the battery cutoff, voltage at battery 13.7. Voltage at truck battery 14.1, so I still have a 0.4 drop.
The time I got 13.2 at the trailer battery I didn't measure the voltage at the truck battery. I had just been driving the truck, so if it's charger voltage drops down after being driven a while, it could have been lower. The 13.8 measurement was earlier, while I didn't have any connection at all.
A later experiment, with the battery disconnected. At truck battery 13.88. At trailer battery terminals with nothing on but the propane detector, 13.83. Turn on the bathroom fan, it drops to 13.69. So there is still a fair amount of resistance there.
Those numbers are much better! All looks good now IMO.
