That pump gets as hot as the engine when running. While it could be heat I would be surprised.Installed in the engine bay, passenger side on top. Had no problem for months, then couple months ago it started popping fuses.
The reason why I had suspected heat is because the fuses seem to blow at the flip of the switch, basically as soon as I get off the trail and open the hood and flip the switch ON.
I'd change them out and may have one or both pop again....after that I am able to air up without trouble.
I suspect that the fuses stop blowing for the reason that the hood is open long enough to make a difference in temperature
I am going to test that theory with a thermometer OR leaving the hood open for about 5 minutes before I flip the switch ON.
My recommendation for things to check
- check ARB relays on the Air Compressor. You take off the black sheet metal shield and there is one for each pump. I can’t remember if you have to only remove the black cover or have to remove the pumps actual cover on the fan side.
- trace the ground and power line, as well as others and look for where wires could be rubbing and maybe are creating a short. Over a short time period vibration could wear thru wire jacket
- check your ground is tight and not loose
- check connectors to make sure they’re fully plugged in. Also give each wire going into a connector a light pull to make sure there isn’t a bad crimp on one creating a loose connection.
what you’ve said in this thread sounds like a short to me, not a heat issue. also ARB tech support is great. US support is in WA and they’re very good about helping diagnose problems. I don’t know where in WA you are but they’re in Auburn and before the pandemic you could go there and get help. Unsure on that stuff currently. ARB support: 425.264.1391