Cooling fan wiring tutorial - water well drilling rig

The hydraulic oil cooling fan provides heat dissipation and cooling for the hydraulic oil during normal well drilling operations, so that the machine can continue to work stably in the hot summer high temperature environment.
Its working voltage is DC 12V. One wire is connected to the negative terminal of the battery (or the metal casing of the machine), and the other wire with a red clip needs to be connected to the positive terminal of the battery.
After the machine is shut down, the red clip needs to be removed from the positive terminal of the battery to prevent the battery power from being drained by the fan, causing the diesel engine to fail to start normally due to insufficient power.