Electric Fan Voltage Drop

The actual voltage drop can vary depend on the condition of the wire the conduit being used the temperature the connector the frequency etc.

Electric fan voltage drop.

When the air is on and the auxiliary electric fan kicks in my voltage drops from 14 2 down to about 12 5 13. You may double the fan belt or use a serpentine belt so it won t slip. The alternator is tricked into working harder to compensate for the 1 2v difference it is seeing. Grab a volt meter and measure the voltage at the alternator.

If dip to 11 volts then your alternator is either not delivering the 100 amps or the fan belt is slipping. Might help you a lot with the voltages your are seeing. There must be little or no voltage drop at the fan motors. What the diode does is drops the voltage by about.

It is recommended that the voltage drop should be less than 5 under the fully loaded condition. I have never had any problem with the battery going dead or any long term charging issues. Basic voltage drop law v drop ir. The voltage drop test is a dynamic test intended for use mainly with high current draw systems such as the starting system charging system or items such as a heater fan electric fuel pump or.

If does not drop then run a heavyer gauge wire between the alternator and junction terminal. Put a diode in series at the alternator on the excite trigger wire.