The video has a noble objective but there's a problem with the information on the "resistor". More than just a resistor the component removed from the car is a "thermistor" or "temperature sensitive resistor". As temperature goes up the resistance goes down and vice versa at ambient temperature it remains open. This makes the component the control you want on the car for the radiator fan I.e as the engine gets hot +200 degrees the resistor senses the temperature and drops to a preset value that turns on the fan. As temp drops the thermistor increases value and shuts current to the fan motor and a cycle of temperature enabled cooling takes place. What happened is his test was a short of the thermistor which by the way has that big green thing as an actual resistor- that's not the thermistor which is a small can type component mounted between the resistor and an external pin. So our guy was merely shorting out the component simulating high temperature just enough for the test since a short isn't what level the thermistor reaches. It is a test still but expect your in circuit test to require running the car to the "turn-on" temperature settings.
sorry, does the thermistor send a low or high fan speed signal? my 2008 town country truck only runs the fan on low speed. the low and high relays are fine. Thank you very much
To prevent corrosion, rust and oxidation on,relay pins, junction box holes connection or battery posts and wire or cable terminals apply dap of silicon / dielectric grease. So, add dap of dielectric grease junction box hole. Also, it will ease insertion & removal of relays, fuses and any component that has pins and or legs.
Radiator cooling fan has 2 speeds: Normal and Jet Engine. To get Jet Engine you either turn the AC on or have the engine overheat to about 100-110C (212-230F). To get the normal speed you need to add something to the 12V circuit between the battery and fan to make it get less voltage, thus spin slower. Here comes that thingamajigger resistor thingy. When it goes bad you lose your normal fan speed and the radiator cooling fan ONLY comes on when the Jet Engine requirements are met, which is no bueno as far as engine temperature go. So symptom no. 1 is engine temps getting toasty, accompanied by the Jet Engine fan speed. Kinda late reply but hell...it's something. Hope it still helps.
What was the reason you changed the resistor in the first place? No low speed? When you did the resistor test. Were you testing the resistor your took out of the new one you put in?
I have an 09 charger 3.5 and, mine looks almost like yours except, the female has 4 leads and the male resistor has 3 points. Why doesn't the male resistor have 4 points to match the 4 female leads? Thank you so much for your video and help. GOD bless people like you trying to help other people.
Didnt make that too helpfull for you to get to, youve done many cabin fan resistors that were less arm twisting and easyer. Easy-ish to fit, but a swine to slide out :-( That pot/nichrome wire resistor reminds me of the ones in old valve/tube radios, they lasted years :-). Cant beat a basic wirewound resistor :-)
@@RichpinTv I have a problem at mines when the vehicle heats up the fan turns on and low after a minute it goes on high gear and then I get a cold po480 we change all the relays and cooling temperature sensor and it still does the same thing can it be the resistor
The video has a noble objective but there's a problem with the information on the "resistor". More than just a resistor the component removed from the car is a "thermistor" or "temperature sensitive resistor". As temperature goes up the resistance goes down and vice versa at ambient temperature it remains open. This makes the component the control you want on the car for the radiator fan I.e as the engine gets hot +200 degrees the resistor senses the temperature and drops to a preset value that turns on the fan. As temp drops the thermistor increases value and shuts current to the fan motor and a cycle of temperature enabled cooling takes place.
What happened is his test was a short of the thermistor which by the way has that big green thing as an actual resistor- that's not the thermistor which is a small can type component mounted between the resistor and an external pin. So our guy was merely shorting out the component simulating high temperature just enough for the test since a short isn't what level the thermistor reaches.
It is a test still but expect your in circuit test to require running the car to the "turn-on" temperature settings.
sorry, does the thermistor send a low or high fan speed signal? my 2008 town country truck only runs the fan on low speed. the low and high relays are fine. Thank you very much
This man is a GREAT teacher
Thank you for the kind words.
To prevent corrosion,
rust and oxidation
on,relay pins, junction box holes
connection or battery posts
and wire or cable terminals
apply dap of silicon /
dielectric grease.
So, add dap of
dielectric grease
junction box hole.
Also, it will ease insertion & removal
of relays, fuses and any component
that has pins and or legs.
Wow and wow thanks and thanks again
Can you explain the symptoms that led to this replacement? I think mine might be faulty, but before I spend 50$ on a part, I'd like to find out.
Radiator cooling fan has 2 speeds: Normal and Jet Engine. To get Jet Engine you either turn the AC on or have the engine overheat to about 100-110C (212-230F). To get the normal speed you need to add something to the 12V circuit between the battery and fan to make it get less voltage, thus spin slower. Here comes that thingamajigger resistor thingy. When it goes bad you lose your normal fan speed and the radiator cooling fan ONLY comes on when the Jet Engine requirements are met, which is no bueno as far as engine temperature go.
So symptom no. 1 is engine temps getting toasty, accompanied by the Jet Engine fan speed.
Kinda late reply but hell...it's something. Hope it still helps.
@@catalin-viorelbriceag1097pool
THANK YOU
What was the reason you changed the resistor in the first place? No low speed?
When you did the resistor test. Were you testing the resistor your took out of the new one you put in?
How do you know if its the resistor my fan isnt blowing at all
Could u leave your fan jumped out during summer
How can we check the hi speed? Give 12 v without the resister?
I have an 09 charger 3.5 and, mine looks almost like yours except, the female has 4 leads and the male resistor has 3 points.
Why doesn't the male resistor have 4 points to match the 4 female leads?
Thank you so much for your video and help.
GOD bless people like you trying to help other people.
Hi because some models works with different speeds low signal and some cases when is a overheating the fan kick faster
I DO THAT IN GRAND CARAVAN BECAUSE IS OVER HEATHING PASS HALF OF THE MIDDLE THANK-YOU
My fan resistor is broken on my 2012 dodge caravan. What exactly does the fan resistor do?
Coefficient of resistance, the hotter the element gets the more electrical current it conducts until it's trips to "on".
Did your van overheat ?
When testing the resistor, does it mater which side I have my lead hooked to. When it is hooked on one side it works, on the other it does not.
wire to the Negative en wire to the positive with fuse ??
What fuse did you use
in my car one tap is broken does it effect
Daca se poate să-mi spuneți de unde se poate de procurat acela care arătați
How do you test one?
What exactly is the purpose of the resistor? I'm guessing it must limit current, but does it do anything else?
It gives the slow radiator fan mode, then bypassed for warp 9 super cooling lol :-D
Didnt make that too helpfull for you to get to, youve done many cabin fan resistors that were less arm twisting and easyer.
Easy-ish to fit, but a swine to slide out :-(
That pot/nichrome wire resistor reminds me of the ones in old valve/tube radios, they lasted years :-).
Cant beat a basic wirewound resistor :-)
I miss your maintenance videos are you semi-retired now, when r u coming back with those type ?
Yes i do not do as many as i used to but i still try to do them.
@@RichpinTv I have a problem at mines when the vehicle heats up the fan turns on and low after a minute it goes on high gear and then I get a cold po480 we change all the relays and cooling temperature sensor and it still does the same thing can it be the resistor
Spanish please