Normally, blower resistor for aircond car can be fuse blow. (Thermal fuse type). In my case, civic 1.7 ex 2002, i take out a part (DENSO 077800-0682) and open the black cover. inside there, have electronics board with some components. The Thermal fuse is paraller with Power FET. If you can't get the thermal fuse to change (checking using ohm meter to confirm it has cut off), just take a small wire and soldering between to leg of the thermal fuse. Then, try reassemble your blower resistor denso 077800 and try on your aircond.
Check the voltage to the blower motor,if there is voltage to the blower motor,then it is bad,replace it,If there is not voltage to the blower motor,check the blower relay,to see if it is getting voltage to it,then pull the fan control switch,look on the back to see if there is burned terminals,and check for voltage to the switch,and the out put.
Testimonial: "Sorry, it took so long to let you know your solution was absolutly correct....after "customizing" the interior fire wall that is. Thanks !"
As for the fan.... look under the dash at the duct work near the fan motor. you will see a connector that goes into it with a wiring harness. remove the two or three screws. that is a resister block. it may have failed. while you have the block off apply power to the wires that go to the fan to test that it works. if the fan won't turn by applying power there the fan needs to be replaced.
i realize this is a honda but they make the crown vic in canada and you can't even buy it here. so no it's not different. there may be a sheild you have to remove. sometimes it is accessible thru the glove box. but the resister block will be near the fan. and it's attached to the duct work. two leads actually go to the fan from there. after you have located the plug in ... into the side of the duct work you will see which wires go to the fan. apply positive and negative 12 volts to test the fan. be sure to apply voltage to the correct "sides"
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Thanks to Razman! Solved my Civic 1.6 sedan 2002 problem as well, the thermal fuse in the relay was blown, shortcircuited it and everything fine. Eventually I will replace the thermal fuse
Found this problem with the Honda Civic 2004. The fan does not blow.
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Is there a fifference if the car is a Canadian model [I was told it is a USA model, though built in Canada. I do not see anything short of removing the entire underdash panel.
After having to drill a hole through the dash plate to get the 2nd little screw out [no angle would work...this was one of those classic stand on your head gyrate your torso, and scrape all but 2 knuckles.....you know Honda has a special tool for this job !!] I got out what appears to be a sending unit that would react to air flow temperature more than a rely [part # 077800-0682 by Denso that they can not cross reference on theier website] I will call a Honda Dealer and see if it can be the culprit, but thought you should have an update. This is not my first rodeo my freind , I pride myself as a "Mc Guiver" type and I am glad I remembered my prayers this morning !!
Paul
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