SPONSORED LINKS

THERE IS NO POWER GOING TO THE AC RELAY. COULD IT BE THE CONTROL HEAD?

  • Tiny
  • bmccloy
  • 2001 Honda CRV
  • 13,000 miles

I've checked both fuses, both are fine. I can jump the clutch on at the relay but there is no power coming from the computer.

Do you
have the same problem?
Yes
No
Friday, August 3rd, 2012 AT 3:27 AM

4 Replies

  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

If you are doing the testing correct, it is not the PCM. PCM grounds the circuit for the relay to work and battery voltage is supplied by the fuses.
Did you use the relay to jump or done by removing it?

SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Friday, August 3rd, 2012 AT 3:58 AM
  • Tiny
  • bmccloy
  • Member

I removed the relay and jumped the pin with constant power to the pin that goes to the compressor (don't remember pin numbers). The compressor will kick on but the computer isn't recognizing the ac is on so it idles very roughly and dies eventually.

Was this
answer
helpful?
Yes
No
Friday, August 3rd, 2012 AT 1:37 PM
  • Tiny
  • bmccloy
  • Member

That is with the ac button on. Occasionally when you toggle the switch on and off, the compressor will kick on for a second. Could the ac button be bad even if the green light is on?

Was this
answer
helpful?
Yes
No
Friday, August 3rd, 2012 AT 1:40 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

At the relay there must be 2 terminals with battery voltage with ignition switch turned on.

Toggling the switch makes the compressor works could be due to a faulty switch which has 2 circuit, 1 for the indictor light and the other for the compressor to know the switch is turned on.

You would need a test light or DVOM to test.

Was this
answer
helpful?
Yes
No
Friday, August 3rd, 2012 AT 6:29 PM

Please login or register to post a reply.

Similar Questions

1997 Honda Accord Air Conditioning

Air Conditioning Problem 1997 Honda Accord 4 Cyl Front Wheel Drive Automatic 127000 Miles I Need To Know How To Hook Up The Relay ...
Asked by myronmcq01 ·
1 ANSWER

1990 Chevy Suburban A/c Relay Only Works When I Tap ...

Air Conditioning Problem 1990 Chevy Suburban V8 Four Wheel Drive Automatic 160000 Miles Hi, I Am Having Trouble With My A C Fan ...
Asked by pushingvws ·
12 ANSWERS

Ac System/relay

Ac Not Working Bought Van That Way It Seems All There. I Was Gonna Jumper Relay To Fill With Freon. Chiltons Online Says Could Be Dual Air ...
Asked by fixitmr ·
15 ANSWERS
3 IMAGES

Have To Ground A/c Relay To Get Compressor To Start

The Ac Compressor Wont Come On It Is Full Of Freon And The Fuses Are Good And The Relays Are Good Too. I Can Get It To Come On If I Put ...
Asked by john4084 ·
1 ANSWER