1G Toggle switch for blower motor

[AWD-Tony]

My goal is to able to turn on the d/s ac cooling fan using the factory setting (blower fan switched on with ac button pushed in) while being able to control the blower motor (on or off). If I unplug the connector to the blower motor, it works how I plan to use it.

Can I use this switch on the black wire to the blower motor? Basically a toggle switch for the ground side to the blower.

weideer 10PCS ON/Off Switch 12V Rocker Toggle Switch SPST Mini 20mm 6A/250V 10A/125V AC Circle 12 Volt Switch with Wires for Car RV Marine Boat KCD1-5-101-ON Off-X https://a.co/d/4ZzTHm0

 

[1990TSIAWDTALON]

Tony, check the amp draw on the motor so you get a switch rated for more than it pulls. General search says between 5 and 20 amps (hence a 20 amp fuse). Just don't want you to burn up a switch.

 

[AWD-Tony]

Tony, check the amp draw on the motor so you get a switch rated for more than it pulls. General search says between 5 and 20 amps (hence a 20 amp fuse). Just don't want you to burn up a switch.

I’ll do that. Thanks Marty!!

 

[AWD-Tony]

Why can’t I measure amperage? Am I doing something wrong or is my mm not capable?

With key on and blower motor on, the blower doesn’t turn on. With it plugged in normally (without jumper and mm) it works as it should.

Anyone know the max amp draw for 1g blowers?

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[DogWhistle]

Your left terminal is rated at 10A max, so you may have blown the fuse inside the meter.

To more reliably and safely accomplish what you want to do with the switch, use a relay that is rated for 30A. It seems ridiculous that we need to make more complex circuits to handle simple tasks, but that is life when dealing with high amperage systems.

 

[AWD-Tony]

Your left terminal is rated at 10A max, so you may have blown the fuse inside the meter.

To more reliably and safely accomplish what you want to do with the switch, use a relay that is rated for 30A. It seems ridiculous that we need to make more complex circuits to handle simple tasks, but that is life when dealing with high amperage systems.

A toggle switch inline on ground side won’t work?

 

[1990TSIAWDTALON]

It is hard on the switch. A relay is reliable and wouldn't burn out. Just as @DogWhistle said, its a more complex circuit but it will last.
For the amp draw test, I put my DMM in series with the current. Put it on Amps and turn on the blower. It should flow current THRU your meter and then to the blower motor and show the Amp draw flowing thru the meter.

 

[AWD-Tony]

Are you guys suggesting a relay to control the cooling fan? Not a relay to control the blower motor, correct?

I’m trying to keep this as simple as possible. If my idea of the switch won’t work, can someone tell me exactly why?

 

[DogWhistle]

Oh, it will work alright, but only for a few minutes. The blower motor draws too much amperage to pull current through a switch. That current heats up the switch and the wires and usually melts the coating off of the wires before it continues and gets real interesting.

Marty has a diagram from one of his recent posts that will show you a basic relay connection diagram here:

https://www.dsmtuners.com/threads/simple-4-pin-relay-diagram.512623/#post-153865297

 

[steve]

A toggle switch inline on ground side won’t work?

The ground side still has to pass the same current as the hot side.