Honda Odyssey: One Cooling Fan Works On High / Both Work On Low?
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Date: 2020-08-05
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Comments and reviews: 10
Darin
I learned a long time ago about fuses they are like everything else the can go bad (eventually blowing) not because the current rating was excessive but just because the metal used in it had an impurity it causes excessive heat and over time the fuses current handling drops and eventually gets to low to handle the surge current and POP GOES THE WEASEL. the samething can happen in wire as well especially if it runs right at the rated current handling ability. heat cycling is bad and it will eventually kill things. just check the current draw prior to putting in a new fuse. you can also put say a headlight lamp in series with the suspected circuit. the brighter the light the more current the circuit is drawing. full brightness would indicate a direct short. but a fan motor would be very bright but dim some as it gained speed. the light would save torching a jump wire too (wire insulation smells so good) right? It could have been debris that caused a momentary short (excessive current draw) the fan motor ISN'T drawing excessive current now. only about half of the fuse at start up. so I wouldn't say the fan motor is shorting out either (bad windings on the armature) anyway sometimes fuses are weak do to a defect so they can blow out. hope that helps in future electrical diagnostics
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I learned a long time ago about fuses they are like everything else the can go bad (eventually blowing) not because the current rating was excessive but just because the metal used in it had an impurity it causes excessive heat and over time the fuses current handling drops and eventually gets to low to handle the surge current and POP GOES THE WEASEL. the samething can happen in wire as well especially if it runs right at the rated current handling ability. heat cycling is bad and it will eventually kill things. just check the current draw prior to putting in a new fuse. you can also put say a headlight lamp in series with the suspected circuit. the brighter the light the more current the circuit is drawing. full brightness would indicate a direct short. but a fan motor would be very bright but dim some as it gained speed. the light would save torching a jump wire too (wire insulation smells so good) right? It could have been debris that caused a momentary short (excessive current draw) the fan motor ISN'T drawing excessive current now. only about half of the fuse at start up. so I wouldn't say the fan motor is shorting out either (bad windings on the armature) anyway sometimes fuses are weak do to a defect so they can blow out. hope that helps in future electrical diagnostics
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Duane
Typically when the 2 fans shut off and they both take the same amount of time to stop rotating and the suspect fan does not stop too much quicker than the good fan, there is no problem with bearings, dragging internal parts, etc. As you mentioned, due to the accident the fuse may have blown in the past, the body shop fixed the broken wire but did not know how to test a 2-speed fan system so they did not know the fuse was actually blown. That is my story and I am sticking to it. Thanks for the great video and diagnostics for 2-speed cooling fans. (Hiding in there somewhere is a bare wire waiting to short out hehehehe)
Would like to have seen you manually bypass certain relays to operate each fan independent based on your different speeds on your wire diagrams just to prove out the theory but that is extra free work for your viewers hehe.
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Typically when the 2 fans shut off and they both take the same amount of time to stop rotating and the suspect fan does not stop too much quicker than the good fan, there is no problem with bearings, dragging internal parts, etc. As you mentioned, due to the accident the fuse may have blown in the past, the body shop fixed the broken wire but did not know how to test a 2-speed fan system so they did not know the fuse was actually blown. That is my story and I am sticking to it. Thanks for the great video and diagnostics for 2-speed cooling fans. (Hiding in there somewhere is a bare wire waiting to short out hehehehe)
Would like to have seen you manually bypass certain relays to operate each fan independent based on your different speeds on your wire diagrams just to prove out the theory but that is extra free work for your viewers hehe.
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bookerol
I would think that earlier in the year, when you repaired the AC, the high fan may not have even come into play.
I once had a problem Jeep that died occasionally. Can't remember which fuse, but it used that same type of fuse and had a fracture in the internal conductor. Vibration, whatever, once in a while it would open and the engine would die, but restart eventually. In your case with high current, a cracked fuse would burn out and open permanently. Just a thought.
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I would think that earlier in the year, when you repaired the AC, the high fan may not have even come into play.
I once had a problem Jeep that died occasionally. Can't remember which fuse, but it used that same type of fuse and had a fracture in the internal conductor. Vibration, whatever, once in a while it would open and the engine would die, but restart eventually. In your case with high current, a cracked fuse would burn out and open permanently. Just a thought.
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Ken
Had sort of the same problem years ago on my Chrysler New Yorker. Took it in and the problem was the fan. They replaced it and said it was fixed. (NOT) It worked fine while driving but when you came to a stop light and waited, the temp light would come on until you started driving again. Problem -- the fan was running backwards. Simple fix was just plug the wires in reverse. Needless to say I never took my car back to that shop again.
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Had sort of the same problem years ago on my Chrysler New Yorker. Took it in and the problem was the fan. They replaced it and said it was fixed. (NOT) It worked fine while driving but when you came to a stop light and waited, the temp light would come on until you started driving again. Problem -- the fan was running backwards. Simple fix was just plug the wires in reverse. Needless to say I never took my car back to that shop again.
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TS
The A/C fan doesn't come on in my '86 Celica. I was looking at the wiring diagram a few hours ago, trying to remember the one electronics class I took in High School back when the hottest gaming system was called Pong. I'm so glad I found this video because now I am going to make several photocopies of the relevant part of the wiring diagram, get me a pretty pink and a pretty purple highlighter and sort this out like the man that I am!
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The A/C fan doesn't come on in my '86 Celica. I was looking at the wiring diagram a few hours ago, trying to remember the one electronics class I took in High School back when the hottest gaming system was called Pong. I'm so glad I found this video because now I am going to make several photocopies of the relevant part of the wiring diagram, get me a pretty pink and a pretty purple highlighter and sort this out like the man that I am!
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halleffect1
following your excellent diagram presentation I couldn't help but get devious when you said the one high speed leg is powered but it comes to a dead end. so you could feed that into the horn relay. When the high speed fan circuit energizes, like when sitting in traffic with cars in front of you, the horn starts blowing: D: D
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following your excellent diagram presentation I couldn't help but get devious when you said the one high speed leg is powered but it comes to a dead end. so you could feed that into the horn relay. When the high speed fan circuit energizes, like when sitting in traffic with cars in front of you, the horn starts blowing: D: D
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DANNY
Mines is a 2000 honda odyssey 3. 5 liter v6 the ac fan works but the cooling fan dont ik honda boths fans are suppose to come on together to cool engine down right now my engine has an over heat and p0117 code change the ect sensor and i have a 5 volt reference HELP in your video the cooling fan comes right back on mines not
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Mines is a 2000 honda odyssey 3. 5 liter v6 the ac fan works but the cooling fan dont ik honda boths fans are suppose to come on together to cool engine down right now my engine has an over heat and p0117 code change the ect sensor and i have a 5 volt reference HELP in your video the cooling fan comes right back on mines not
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Jesse
Your explanation of the wiring diagram was great. I think a lot of people are intimated by electrical work because they don't have a solid understanding of electricity and how to read diagrams. As an engineer I've had a lot of practice but I still enjoyed seeing you work out the logic here
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Your explanation of the wiring diagram was great. I think a lot of people are intimated by electrical work because they don't have a solid understanding of electricity and how to read diagrams. As an engineer I've had a lot of practice but I still enjoyed seeing you work out the logic here
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Uk
Saying what the actual problem is in there mind means you will accept no responsibility for the problem you fixed a month ago meaning the problem they now have is a problem YOU missed or didn't fix properly, they then hope you fix it for free because they paid once already
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Saying what the actual problem is in there mind means you will accept no responsibility for the problem you fixed a month ago meaning the problem they now have is a problem YOU missed or didn't fix properly, they then hope you fix it for free because they paid once already
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Bat
I drive a 2009 Honda Oddy with same issues. (10 Years old) Traffic Sucks, When I get cruising its blows cold. Drivers side warm passengers side cool.
Changed the fuse as well. No change.
Hope you fix it and let everyone know how this was done!
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I drive a 2009 Honda Oddy with same issues. (10 Years old) Traffic Sucks, When I get cruising its blows cold. Drivers side warm passengers side cool.
Changed the fuse as well. No change.
Hope you fix it and let everyone know how this was done!
reply
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