A/C problem. more confused now after reading threads
 

hi all, thanks for putting up this site. mine is a 2003 accord 2.4 4cyl motor ex model. i've been reading all post related to my a/c problem but i'm more confused. i'll try the simpliest way to describe my problem

when turning on the A/C, compressor engages but blower motor does not turn on any speed.

blower motor turns okay when wired directly to 12V source. test probed wires plugged to blower motor, white gives out 12V but blue/black does not give out negative power.

tested wires plugged into the resistor, blue gives out 12V while all other pins have no power.

tested relays under hood and dash all are okay

in some thead, they mention resistor while others say transistor, are they reffering to the same thing?

if it's the resistor, can you point me where i can buy it? i've got denso part # 077800-0780. is there any other brand and part # i can use?

please help me, this is my wifes car and she drives it in the nevada desert sans A/C.

thanks in advance

I am not sure what you meant about the blue/black wire and negative power?

One pin of the blower motor should have 12V when touching the other volt meter lead to ground. The other pin should have continuity (~zero resistance) to ground. Verify ground on all of the fan speed settings.

Same thing; it's what controls the blower motor to run at different speeds. Every car company has used resistors for like 75 years, so that's what most people call it. But in modern cars it's probably some kind of solid-state motor controller.

sounds like your resistor is bad,,,,,,,,where did you get that part # ??

sedan 79330-SDA-A01

coupe 79330-S6M-941

these are Honda part #s that ALL-DATA is giving me

thanks guys
 

the part # i gave you is what is embossed on the part itself.

what part # should i get and what online store. i just need a replacement brand now, i'm out of regular job.

thanks again