Need fuse box diagram for fuses and/or relays control the A/C compressor

Tiny
CHARLESTUCK
  • MEMBER
  • 2004 MAZDA B3000
  • 3.0L
  • 6 CYL
  • 143,000 MILES
I need to find which fuses and/or relays control the A/C compressor. Currently the compressor does not engage even after I attempted to charge the system. Should I start the compressor another way, such as by jumping wires? I don't have owner manual. I don't have a diagram or legend.
Wednesday, April 15th, 2020 AT 2:08 PM

7 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Here is a wiring diagram and fuse/relay break down. Yes. You can jump 12 volts directly to the compressor and it should come on while you are attempting to fill the system. If it doesn't come on then you may have an issue with the compressor.

If it does come on and you fill the system and it still doesn't come on then you have a power issue.

Let me know if you have questions and we can go from there.
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Wednesday, April 15th, 2020 AT 2:20 PM
Tiny
CHARLESTUCK
  • MEMBER
  • 60 POSTS
Thanks.
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Wednesday, April 15th, 2020 AT 5:31 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
You are welcome. Please let us know if you need anything else.
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Wednesday, April 15th, 2020 AT 5:41 PM
Tiny
CHARLESTUCK
  • MEMBER
  • 60 POSTS
The clutch doesn't engage. I jumped it with the battery. The clutch didn't budge, though, there was spark at the battery terminal. Should I try spraying it with penetrating oil? Is there any chance of replacing the a/c clutch without removing the compressor? Does't look to difficult too replace the compressor.
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Wednesday, April 15th, 2020 AT 6:02 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
I am not sure if the clutch can be done inside the vehicle. It can be done but on this vehicle I am just not sure because you need to get a puller on the front and I don't know if you have enough room. I included the process and they have you remove it.

As for penetrating oil, that will most likely not work if the clutch has failed. It is not a matter of being corroded, it is the clutch is locked and even if you get it loose I doubt it will operate properly again.

Also, does the pulley turn easily or does it make noise when you turn it with the belt off? If it does then the bearing is failed as well. If this is the case you will need a compressor.

If it were me, I would just go ahead and replace the compressor.
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Thursday, April 16th, 2020 AT 5:24 PM
Tiny
CHARLESTUCK
  • MEMBER
  • 60 POSTS
I have decided to replace the compressor. Thanks again. You guys are the best.
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Thursday, April 16th, 2020 AT 6:44 PM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Sounds great. Thanks for the update. Let us know if you need anything in the future. Thanks
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Thursday, April 16th, 2020 AT 6:55 PM

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