Question about 2004 Honda Accord

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The blower motor checks good but doesn't come on with the blower motor switch. All fuses are good. Switch or resistor?The ground on the resistor is good, motor works when grounding the white wire at the resistor. Other two wires show no hot or ground [ with test light] when turned on. 2004 Honda Accord.

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Posted on Sep 20, 2009

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1 Answer

Ac/heater fan doesn't work


According to my wiring diagram, the blue and white wire from the blower motor gets power from the key switch. The fan switch and resistor grounds the motor.
No blower fuse is listed.

Feb 03, 2013 | 1988 Honda Accord 4 Door

1 Answer

My heat stopped blowing in my 1998 escort zx2 it just quit where do I start I checked all the fuses they are good is there a blower motor relay ??


"I checked all the fuses.." There is only one fuse, the 20A WIPER one in the instrument panel fuse panel which energizes the blower motor relay. The panel also contains the BLOWER circuit breaker which supplies power to the relay. If these parts check OK, there will be 12 volts on terminal 87 of the relay with the engine running and 12 volts on the BLU wire connected to the blower motor. If you set the function selector switch to any position other than OFF, the blower motor should operate at a speed you select by rotating the blower switch. If this doesn't happen, rotate the blower switch to HIGH. If still nothing, the thermal limiter in the blower motor resistor may be open. If still nothing, the function selector switch, the blower switch, the resistor or even the blower motor itself could be defective

Oct 13, 2012 | Cars & Trucks

1 Answer

--2005 GMC Envoy AC Trouble--(compressor still active) Have replaced blower motor (original one had "burn" evidence), resistor and resistor connector. The blower is still not working. Have...


SOUND LIKE BAD BLOWER MOTOR RESISTOR.CHECK BLOWER MOTOR HI BLOW FUSE AND RELAY.YOU WILL NEED OWNERS MANUAL IN GLOVE COMPARTMENT TO LOCATED BLOWER MOTOR FUSES AND RELAYS.

Jun 06, 2011 | GMC Envoy Cars & Trucks

1 Answer

New Blower Motor, Resistor, Relay, Switch, all is new. Still nothing works. Any advice would be greatly appreciated. Please Help me out. HINK1974


There are two fuses a 40 amp in the power distribution center and a 10 amp in the fuse block. Are they good?

This is a ground side controlled system meaning the switch provides ground instead of power. With everthing plugged in there should be power on all the wires coming out of the blower motor resistor ( brown w/ tan, Light Blue, Light green w/ black, and tan wires). If you ground any of those wires the blower motor should run. If it does check the dark green wire at the HVAC control head. Backprobe that wire with it plugged in if there is power than either the control head is bad ( the mode switch has the final say in the path to ground for the blower motor. When the mode switch is in the off position the blower will not work. When it is in any other position (vent/floor/defrost) it allows the path to ground for the blower motor to be complete.

The last thing to check is to make sure the black wire coming out of the control head has a good ground. That is the final path to ground for the blower motor.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Jan 10, 2011 | 1999 Jeep Wrangler

1 Answer

I have 2002 infinity I35 and the blower motor stop working ,I took out the blower motor to make sure was good. YES the blower motor still working .the only think I really don't know how to check is Blower...


WELL YOU HAVE TO USE A VOLT METER CONNECT ONE VOLT METER WIRES TO GOOD GROUND AND THE OTHER VOLT METER WIRES GOES TO EACH SWITCH SPEED.IF VOLT METER GET VOLTAGE A 1 OR 2 CONTROL SPEED RESISTOR BAD.IF RESISTOR BAD YOU WILL GET 1 OR 2 BLOWER MOTOR SPEEDS.IF BLOWER MOTOR WORKING.CHECK THE AC AND HEATER CONTROL SWITCH FUSE OR CHECK BLOWER MOTOR FUSE AND RELAY.IF ALL GOOD SO FAR CONTROL SWITCH ITSELF COULD BE FAULTY.

Nov 05, 2010 | Infiniti I35 Cars & Trucks

3 Answers

No blower for heat or a/c.50amp fuse good ,swapped relays no change.0 volts dc at any of 4 blower switch wires,what am i missing cant find wire diagram?


here is how your system works. The mode switch provides power to the blower relay. With the relay on, 12 volts goes from the relay to the blower motor. The negative power comes thru the resistor and switch (except for Lo, which doesn't go thru the swtich), which also has a thermal fuse. If the 50 amp fuse in the engine compartment is good, the thermal fuse in the resistor is the most likely cause, though switch failure often causes the thermal switch to blow. You should use an ohmmeter to test the switch for multiple continuities. There is no power to the switch except what comes thru the motor and resistor. Please see my tip at http://www.fixya.com/cars/r6234839-doesn_t_heater_or_air_conditioner_blow and let me know if you have questions.

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Oct 19, 2010 | 1997 Ford Econoline

2 Answers

Blower motor not working at all. 2003 ram van. checked, fuse, resistor, switch, relay.no power at the motor


the resitor operates ground, if theres no power then its a bad fuse under the hood in the power fusebox, or #10 fuse inside the leftside of dash, power for the blower comes from the ignition switch,double check all fuses,if you had no ground to blower then i would say the resistor,make sure you have a good ground on the test light, then check for power with key on again, heres a wiring diagram to help you, good luck.fd18d13.gif

Mar 23, 2010 | 2003 Dodge Ram Maxi

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