'94 - A/C Relay...Relay Block...Need help jumping

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'94 - A/C Relay...Relay Block...Need help jumping

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Blazer >> Mechanical & Maintenance >> General Tech Help >> 1st Gen (1983-1994) Tech >> '94 - A/C Relay...Relay Block...Need help jumping

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'94 - A/C Relay...Relay Block...Need help jumping - 5/30/2008 5:18:35 PM

bestes

Posts: 1
Joined: 5/30/2008
Status: offline

My compressor clutch is not coming on and I was told I could jump the relay with pins 30 and 87. I understand all of that, I just need to know where the A/C relay is located. Autozone website said this: "Front seating area, center, behind dash, passenger side of A/C controls, mounted in relay block". I guess Im not reading this correctly. Do I need to remove some of the dash to get to this or is it under the dash? If anyone has a photo of this it would be very helpful. I have a (1994 Full-size Blazer 4WD 5.7L TBI)

Any help would be appreciated. I just need to get the compressor running so I can charge the system. Thank you very much....

BE

< Message edited by bestes -- 5/30/2008 5:29:38 PM >

Post #: 1

RE: '94 - A/C Relay...Relay Block...Need help jumping - 5/31/2008 11:19:03 AM

SilverTalon

Posts: 27
Joined: 12/30/2007
Status: offline

If it just needs to be charged, you can just start filling it. When the pressure starts to rise, the clutch will come on automatically. There's really no need to have the clutch engaged for the purpose of filling it. Just make sure that you run it for about 10 to 15 minutes after reaching max low side pressure to make sure that everything is balanced out inside the system.

(in reply to bestes)

Post #: 2

RE: '94 - A/C Relay...Relay Block...Need help jumping - 5/31/2008 1:16:21 PM

swartlkk

Posts: 14299
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

To answer the question, it is located on top of the HVAC housing under the dash. It will be in with the blower motor relays and will have a blue/white trigger wire (how to tell it is the correct one).

With that said, I would just jumper it at the clutch to make it engage. You can fill until it kicks on if a low freon level is your problem, but if you have a bad switch, you really should jumper it first to see if it actually cools or you could end up over filling the system.

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Kyle-