The electric fan on the passenger's side, which I'm assuming is the high speed, seems to have stopped working. If I sit for an extended amount of time, with the A/C on and hot outside temps, the coolant temp starts to rise. I popped the hood and only the driver's side fan is running. The 20amp fuse is fine, and the fan relay located in the fuse box looks good. What is it that needs to be fixed?

 

when you got car running and a/c on , still fan does not work???if not ,,get a big screwdriver and smack the back side of the fan if it comes on u need a fan motor ,,,,,,,,if it does not start spinning you need to chk to make sure that u r getting power and ground at the connector ,,if you do,, you got either a bad motor most likely or bad wiring from connector to motor,,,,,,,,,,if you dont have power or ground u could have bad wiring or bad relay since u said fuse is ok
.try this and let me know

 

Also you can try to hand spin the fan. Engine off please. If it doesn't move freely that is bad but it is the motor also. Otherwise I have replaced ECT sensor on civics that are faulty causing the fan to not work. You can check continuity on cold engine, there should be none. Warm engine to normal or higher conditions and recheck. You should have continuity, if not sensor is bad. It should show continuity at around 194 - 198 degree F. It will be a 2 pin connector in your cooling lines. Usually it is the one opposite of the thermostat housing.

If your wiring appears good then try these. Otherwise you can also hook direct juice to your fan and see if it comes on but be careful not to short things.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sauceja &raquo;</TD></TR><TR><TD CLASS="quote">
If your wiring appears good then try these. Otherwise you can also hook direct juice to your fan and see if it comes on but be careful not to short things.</TD></TR></TABLE>

If it works with direct juice but still doesn't work "automatically", run wire through a relay to a switch inside the car. You can operate the fan manually till you figure out what the deal is.

 

92 and newer civics fans work indipendent of each other , main fan does not come on with a/c ....so if main fan is inop u could have a bad ect sensor but contrary on the acoords both fans come on with a/c on or a/c off when engine reaches a normal temp ( after t-stat opens etc etc ) ..so if 1 fan works with a/c off it cannot be the ect sensor because it would effect both fans not to work ...

 

Desert Honda: Yes that is correct. Accords do operate differently.

So then check fuses, relays, wiring (mice/rats love to chew on this stuff) fan motors. There is if not mistaken more than one relay, the one in fuse box and one by the condensor fan.

Electrical problems are fun!

 

Prolly motor, if you can see it look for shavings around the shaft.

 

I'd go with motor as well. But like DH said better to check all of your electrical before you replace a fan that didn't have to be because the relay or wiring was messed up

 

I just discovered that my main relay is bad. Could this have any effect on the high speed fan? Also, just to be sure, is the high speed fan located on the passenger (RH) side?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WDW MKR &raquo;</TD></TR><TR><TD CLASS="quote">I just discovered that my main relay is bad. Could this have any effect on the high speed fan? Also, just to be sure, is the high speed fan located on the passenger (RH) side?</TD></TR></TABLE>

there is no high speed fan ......the 1 on the passeng side is the main cooling dfan the 1 on the driver side is the a/c condensor fan ....

the main relay should have no affect on the fan operation

 

Hmm... it seems that when I noticed my car getting hot while running the A/C, the driver's side fan was running and the passenger's side was not. The fuses all check out. Guess I'll whack it with a screwdriver and see if it's the motor.

 

if it still does not come on //at the fan plug make sure that you get power and ground ..

 

Well, I tried both the "wack it" and spin tests, and it passed both with flying colors. All of the wiring is in great shape, and the weatherpack connections all look to be sound. I don't have a multimeter, so I couldn't check continuity or power/ground. I will warn that I am mechanical, not I&E.
What relay(s) would allow for the A/C fan to run, but not the passenger side cooling fan?

 

TTT

 

Anyone? I've been digging through old threads, but can find nothing that specifies a which fan relay does exactly what.

 

I jumped the thermostat switch and the driver's side fan comes on, but not the passenger's. I also swapped the cooling fan relay in the underhood fuse box with the power window relay, which is known to be good. That didn't fix it, either.

I found an old thread that states the driver's side fan is the main fan and the other is the A/C fan. Which is correct?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WDW MKR &raquo;</TD></TR><TR><TD CLASS="quote">I jumped the thermostat switch and the driver's side fan comes on, but not the passenger's. I also swapped the cooling fan relay in the underhood fuse box with the power window relay, which is known to be good. That didn't fix it, either.

I found an old thread that states the driver's side fan is the main fan and the other is the A/C fan. Which is correct?</TD></TR></TABLE>

what is the point for me to try to help you if my advice goes into 1 ear and out the other ..if you scroll up i told you already which fan is on which side , u got a 94 accord 4 clylinder,,,,,,let me repaet it for the last time the 1 on the driver side is rhe A/C FAN MOTOR which leaves the 1 on the passanger side to be the MAIN COOLING FAN MOTOR.......now we know the MAIN FAN the 1 on the passanger side does not work, you chked the fuse # 21 underhood fuse box.. cooling fan relay is also located in same fuse box ..you need to know if u getting proper power and ground at the motor
Try something.. get a wire going from the posit side of battery to the BLUE wire at cooling fan plug make sure u do it to the blue wire the other wire thwere is BLACK that is the ground wire ......if when you give it power and it works ,,it could be a bad relay, wiring or a radiator fan control module ......if when u give it power and does not work ,,, put a wire to the battery negative side or any body grounds and connect it to the BLACK wire at the fan plug if it works you got a BAD GROUND,,..if still does not work give power to BLUE WIRE and ground to BLACK wire if it still does not work u got a bad motor ...........
if you follow these steps u should be able to close in on the issue ..try it and post the results

 

I'll try the power/ground tips. Take it easy on the attitude. I read what you said. All I did was ask for verification, due to conflicting info that is located elsewhere on this site. If I took everyone's suggestions to be gospel, all of my cars would have burnt to the ground by now. You help is certainly appreciated. Where is the control module located?

 

mmm. by your reply i can tell that you are not very mechanically knowledgable otherwise you would know that the suggestions i have made won't in any way shape or form cause damage to your car.......I agree with you that you cannot take eveyone's suggestions but that mostly counts when someone tells you to replace parts and spend your money before diagnosing the problem,, all i have suggested is that you take 15-20 minutes out of your time to diagnose the problem in your car ..............remember we are trying to help one another ..over the net is is a bit more complicated than hands on ,, and there is not 1 magic answer fix all the time ......

have you even tried anything i have suggested???.do me a favor post here all that you have tested so far..

And as for my attitude is a damn good one i try to help people as much as i can and try to save them money . at the same token if a person is not willing to take my suggestions i would appreciate if they would tell me so i don't waste my time

 

You're right; I'm not mechanically inclined at all. Outside of dropping the entire drivetrain, disassembling both heads, installing new springs, retainers, and cams, and timing the entire 32V DOHC in my Cobra, I haven't done anything this week. I don't spend much time on the Honda because there are only so many hours in the day; not because I can't. The minimal amount of spare time I had yesterday was spent soldering all of the connections in my main relay, per your suggestion in another thread.

If you would read all of my responses, you would see what I have tried. You would also see that I never stated you were trying to damage my motor. I simply gave reasoning as to why I don't take every suggestion as gospel. There is absolutely nothing wrong with verifying advice, regardless of how trustworthy the source.

The only thing I have not tried is hotwiring/grounding the fan motor. Here is what I have done:

checked fuses
switched relay with operational power window unit
jumpered temperature switch
physically/visually inspected all wiring and connections
verified manual fan rotation
inspected fan/motor for signs of damage
smacked fan motor with A/C on
looked over wiring diagrams found in other threads
searched under car for timing module

I have not hotwired the fan motor b/c I'm at work and cannot just run out to the parking lot and start working on my car. I didn't do it last night b/c of the aforementioned main relay repair work. I try to maximize the minimal amount of Accord repair time by researching on the web and looking for past experience to guide me. If I'm lucky enough, I can find the appropriate solution w/out much hands-on troubleshooting.

Again, I am very grateful for the help offered by you and every other member on this board. You are obviously very knowledgable about these cars. My specialities include Turbo Regals, LS1s, and DOHC Cobras; not Accords. Your assistance is a lifesaver, but I will not endure ridicule and condescension as a gateway to that help.

Modified by WDW MKR at 11:45 AM 9/1/2005


Modified by WDW MKR at 11:45 AM 9/1/2005

 

Most all fan problems are bad motors. Jump 12 volts to it before trying to make it complicated. That should be the first thing anyone should do with a fan motor that doesn't run. ECT sensor is next. In defence of Deserthonda's position, your ability to take off parts and bolt on new ones does not make you a mechanic any more than it has made you capable of trouble shooting problems. Mechanical and electrical principles are common among all machines whether cars or packaging equipment or laboratory instruments. People like us with a talent for trouble shooting get tired of watching these threads grow because most people don't want to perform any tests to provide us with needed information, but instead keep proposing 'what ifs' in hopes of finding a quick cure all. Good luck with your little fan motor Mr. I build Cobra Jets.

 

WDW i am impressed with all your abilities ... going over the list of things that you have done ,,and according to it you still have not verified wether you are getting a good source of power and ground at the fan connector,, you need to chk that and post it

 

I plan to do so, just as soon as I get home. Thank you.

 

You don't have a clue as to what I do or what I'm capable of. I thought I explained that my lack of spare time hinders my troubleshooting when it comes to the Accord.

By the way... the 32V DOHC motor has nothing to do with the 428 or 429 Cobra Jet engines, or the cars they came in. If you're going to be a smart ***, try to at least be accurate.

 

i don't think amckee was trying to be a smart *** simply making a true statement , people can do this do that but when it comes to electrical troubleshooting they are stumped , i have witnessed it many times .also what i think he was trying to say is that electricity is the same no matter what car you work on so if someone is mechanically inclined or have as much experience with cars such as you ,,one shouild be able to understand electricity 101 ......if a part does not work you need to chk if u get power and ground at the component,, if either or is not there that part will not work ..if u get both than that part is faulty