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Dan, ASE Certified Technician
Category: Honda
Satisfied Customers: 1619
Experience:  Auto Technician
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I have an 04 honda accord, the ac compressor is not

Customer Question

Hello I have an 04 honda accord, the ac compressor is not engaging. I have replaced the compressor so the clutch is new. The cooling fans come on as soon as freon is charged to correct pressure. I have took a jumper wire and jumped the connector where the relay goes and clutch engages. I swap out the relays, I have 12v in two of the ports under the relay, I checked all fuses. Can you please help
Submitted: 4 months ago.
Category: Honda
Expert:  david craig replied 4 months ago.

Hi Im David, when you say the clutch engages when you jumper the relay have you tried it with the engine running to see if the clutch spins?

Customer: replied 4 months ago.
it spins and ac blows cold
Expert:  david craig replied 4 months ago.

ok. give me a moment to pull up a print of the system....what engine do you have?

Customer: replied 4 months ago.
Expert:  david craig replied 4 months ago.

ok thanks

Expert:  david craig replied 4 months ago.

heres a schematic of the system

Expert:  david craig replied 4 months ago.

either the pressure switch, ecm or wiring.

Customer: replied 4 months ago.
Ok well thank you
Expert:  david craig replied 4 months ago.

just do a continuity test of the wiring to the ecm and pressure switch. if the wiring is good, replace the switch. i seriously doubt its the ecm

Expert:  david craig replied 4 months ago.

please accept the answer and leave a 5 star rating for me if you were satisfied with my assistance. its the only way i get credit for my help. thanks and have a great weekend.

Customer: replied 4 months ago.
It was good info but I couldn't use it. When I turn on the ac in the car it sends signal to the relay to turn on the cooling fans, I simply took that same command signal and shared it with the compressor relay. It's working like it should.
Customer: replied 4 months ago.
If I turn on the heater the compressor clutch turns off like it should and if the freon leaks out then the compressor is still protected by the pressure switch
Customer: replied 4 months ago.
Thanks for your help anyway
Expert:  Dan replied 4 months ago.

Different expert here, do you still need help?

Expert:  Dan replied 3 months ago.

Hello again Dan here,

I am contacting you because the post has not been closed or rated.

This question is coming up on 7 days which means it will time out and close.

You have already paid to get this question answered, but you have not rated.

Let me help some more. Is there anything else I can help you with?

If I did not give you 5 star service, please let me know what I missed.