06-24-2014, 08:02 AM
How is it wired? A fan needs to be wired using a relay. The switch (thermostat in your case) isn't designed to have the load for the fan going through it. What size wire is it?
With the ground hooked to the battery, there can't be a grounding issue unless the wire or connection is bad. What size is the fan new or a used junkyard unit?
One way to check it for sure is to wire it directly to the battery and put the mfg recommended or a 20a inline fuse on the hot side. Run the vehicle around town. If the fuse pops, the fan isn't working correctly
With the ground hooked to the battery, there can't be a grounding issue unless the wire or connection is bad. What size is the fan new or a used junkyard unit?
One way to check it for sure is to wire it directly to the battery and put the mfg recommended or a 20a inline fuse on the hot side. Run the vehicle around town. If the fuse pops, the fan isn't working correctly