nolan
Junior Member
- Joined
- Jan 24, 2023
- Posts
- 3
- Reaction score
- 2
- Location
- beckemeyer IL
- First Name
- Nolan
- Truck Year
- 1985
- Truck Model
- K5 blazer
- Engine Size
- 305
Ac fan relay
- Thread starter nolan
- Start date
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- Joined
- Jan 21, 2023
- Posts
- 766
- Reaction score
- 2,259
- Location
- Texas
- First Name
- Robert
- Truck Year
- 1984, 1999,
- Truck Model
- 1984 Chevy Silverado K10, 1999 Chevy 2 door Tahoe 4x4
- Engine Size
- 350 cid, 5.7
Hello Nolan! I hope all is well.
There is two things going on here or two circuits working here.
I can't make out the numbers on the connector.
1) First check when you turn power on to your fan, you should get power to either 3 or 4 terminal, depending which wire is feeding that coil from the switch.
When you turn on the switch power goes to the coil magnetizeding the the metal core making terminal #1 mechanism move or change contact position from (NC) #1 and #5 normally closed
to (NO) #1 and #2 normally open position.
What happens there all it does is turn the switch to run on or turn off blower.
2) The second circuit is that you should have power on terminal # 1 when you turn on the fan switch. What happens it changes the position of the normally open to the closed position sending power from #1 to
# 2 terminal feeding the fan.
The picture on the relay switch shows the coil de-energized / no power to the coil.
Check out the GIF animation.
This video has a good explanation also.
Might be your resistor that feeds the other side of the relay coil.
Check them out. I hope I was able to help.
Be well and stay safe out there.
Best wishes to you and all of your loved ones always!
Sincerely,
Dryriver1
https://www.google.com/search?q=12+...client=mobile-gws-wiz-hp#imgrc=UsUI8vWLT9PhbM
There is two things going on here or two circuits working here.
I can't make out the numbers on the connector.
1) First check when you turn power on to your fan, you should get power to either 3 or 4 terminal, depending which wire is feeding that coil from the switch.
When you turn on the switch power goes to the coil magnetizeding the the metal core making terminal #1 mechanism move or change contact position from (NC) #1 and #5 normally closed
to (NO) #1 and #2 normally open position.
What happens there all it does is turn the switch to run on or turn off blower.
2) The second circuit is that you should have power on terminal # 1 when you turn on the fan switch. What happens it changes the position of the normally open to the closed position sending power from #1 to
# 2 terminal feeding the fan.
The picture on the relay switch shows the coil de-energized / no power to the coil.
Check out the GIF animation.
This video has a good explanation also.
Might be your resistor that feeds the other side of the relay coil.
Check them out. I hope I was able to help.
Be well and stay safe out there.
Best wishes to you and all of your loved ones always!
Sincerely,
Dryriver1
xc_hide_links_from_guests_guests_error_hide_media
https://www.google.com/search?q=12+...client=mobile-gws-wiz-hp#imgrc=UsUI8vWLT9PhbM
xc_hide_links_from_guests_guests_error_hide_media
