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Relays are needed because most toggle, rocker or whatever switches can not handle the current (amps) long term. Yes it will work but the contracts in the switches will eventually burn and the switch will not longer work, possible causing damage to the fan or pump due to low voltage.My advice is to add a relay for the fan and the pump. Both can be turned on by the key switch. Find the wire that has battery voltage with the key on and use it to turn on the relays. Running them off the key switch make it easy to shut them down in the event of a roll over or other emergency.In simple terms relay are just big switches that are turned on by another switch.
Relays are needed because most toggle, rocker or whatever switches can not handle the current (amps) long term. Yes it will work but the contracts in the switches will eventually burn and the switch will not longer work, possible causing damage to the fan or pump due to low voltage.
My advice is to add a relay for the fan and the pump. Both can be turned on by the key switch. Find the wire that has battery voltage with the key on and use it to turn on the relays. Running them off the key switch make it easy to shut them down in the event of a roll over or other emergency.
In simple terms relay are just big switches that are turned on by another switch.
