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Inlet Samba Member
Joined: April 12, 2010 Posts: 287 Location: SF Bay Area
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Posted: Wed Jul 25, 2018 5:04 pm Post subject: Radiator fan does not turn on with AC |
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1984 Westy. 8 years ago I bought my van and it was missing the compressor, and the rear cabinet fan was broken, it seemed like a huge pain to get the upper cabinet fan working right. Well I took it apart and fixed it, and now a new compressor is in the mail. When I turn the AC on, the radiator fan does not come on, from what I've read its supposed to turn on. Is this correct? The Bentley doesn't have anything close to my AC setup.
I've checked the fuses, which I believe are the add on blade fuses yellow and beige and they are fine, but when I pull them the rear fan still runs. Is there a diagram or guide for the AC electronics for a 1984 Westy?
When I turn the AC on, I can hear the relay click on the main fuse panel, and when I go to set the temp, I can hear a click from a small box that controls the AC. Now I don't have the compressor installed so I'm not sure if this is preventing the fan from turning on. The trigger wire is getting 12v. |
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Guybrush Samba Member
Joined: August 08, 2015 Posts: 453 Location: Arizona
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Farf Samba Member
Joined: July 12, 2009 Posts: 463 Location: Colorado
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Inlet Samba Member
Joined: April 12, 2010 Posts: 287 Location: SF Bay Area
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Posted: Wed Jul 25, 2018 7:24 pm Post subject: Re: Radiator fan does not turn on with AC |
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There is no access on the rear D-pillar, I can't find this 50amp fuse. |
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crazyvwvanman Samba Member
Joined: January 28, 2008 Posts: 9920 Location: Orbiting San Diego
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Posted: Wed Jul 25, 2018 7:36 pm Post subject: Re: Radiator fan does not turn on with AC |
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Your year doesn't have such a fuse and has much simpler wiring than late 86+ Westys do. Nothing much in the D pillar for you to check.
Mark
Inlet wrote: |
There is no access on the rear D-pillar, I can't find this 50amp fuse. |
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fxr Samba Member
Joined: December 07, 2014 Posts: 2319 Location: Bay area CA
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Posted: Thu Jul 26, 2018 8:56 am Post subject: Re: Radiator fan does not turn on with AC |
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Inlet wrote: |
Is there a diagram or guide for the AC electronics for a 1984 Westy?. |
Bentley page 97.138
Easily missed. _________________ Jim Crowther
1984 1.9l EJ22 Westy Wolfsburg Edition
Vespa GTS 300 |
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Inlet Samba Member
Joined: April 12, 2010 Posts: 287 Location: SF Bay Area
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Posted: Thu Jul 26, 2018 3:32 pm Post subject: Re: Radiator fan does not turn on with AC |
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So does the radiator fan run when the AC switch is on, even though there is no compressor? |
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fxr Samba Member
Joined: December 07, 2014 Posts: 2319 Location: Bay area CA
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Posted: Thu Jul 26, 2018 3:59 pm Post subject: Re: Radiator fan does not turn on with AC |
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Inlet wrote: |
So does the radiator fan run when the AC switch is on, even though there is no compressor? |
It should do if the "Rad/Cooling fan relay" is present. I'm assuming the compressor is the only item missing. _________________ Jim Crowther
1984 1.9l EJ22 Westy Wolfsburg Edition
Vespa GTS 300 |
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Inlet Samba Member
Joined: April 12, 2010 Posts: 287 Location: SF Bay Area
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Posted: Thu Jul 26, 2018 6:58 pm Post subject: Re: Radiator fan does not turn on with AC |
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Figured it out, first I found a bank of 3 relays tucked up floating in a spot no one would see, I had to follow some wires back to it to find it. These were the ones I was looking for. Next I looked at the switch and saw one of the wire terminals had masking tape around it...hmmm some more PO electrical madness, then I found a black/red wire that wasn't connected to anything. Looked at the wiring diagram, wire colors didn't match up on the switch, he jumped a black wire straight to the fuse panel, all this did was run the upper rear fan. Swapped the wires on the switch around, and now it works like its supposed to. |
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fxr Samba Member
Joined: December 07, 2014 Posts: 2319 Location: Bay area CA
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Posted: Thu Jul 26, 2018 7:19 pm Post subject: Re: Radiator fan does not turn on with AC |
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Well found. _________________ Jim Crowther
1984 1.9l EJ22 Westy Wolfsburg Edition
Vespa GTS 300 |
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RufusRockwell Samba Member
Joined: July 20, 2010 Posts: 116 Location: Oregon
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Posted: Fri May 19, 2023 10:59 am Post subject: Re: Radiator fan does not turn on with AC |
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Having the same issue on my 85 tintop with the funky ceiling mount a/c behind driver passenger heads.
The radiator fan no longer comes on with the a/c fan. Tested radiator fan and it works when I jump the terminals at the temp connector.
Is there a relay for this somewhere? I checked fuses and none are blown. |
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ALIKA T3 Samba Member
Joined: July 30, 2009 Posts: 6346 Location: Honolulu,Hawaii and France
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Posted: Fri May 19, 2023 12:19 pm Post subject: Re: Radiator fan does not turn on with AC |
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RufusRockwell wrote: |
Having the same issue on my 85 tintop with the funky ceiling mount a/c behind driver passenger heads.
The radiator fan no longer comes on with the a/c fan. Tested radiator fan and it works when I jump the terminals at the temp connector.
Is there a relay for this somewhere? I checked fuses and none are blown. |
You have a dealer added AC https://www.thesamba.com/vw/forum/viewtopic.php?t=733489
, you're gonna have to track the wires, I'm not sure there's a diagram for these out there... _________________ Silicone Steering Boots and 930 Cv boots for sale in the classifieds.
Syncro transmission upgrade parts in the Classifieds.
Subaru EJ22+UN1 5 speed transmission
http://www.thesamba.com/vw/forum/viewtopic.php?t=416343
Syncro http://www.thesamba.com/vw/forum/viewtopic.php?t=4...num+gadget |
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RufusRockwell Samba Member
Joined: July 20, 2010 Posts: 116 Location: Oregon
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Posted: Fri May 19, 2023 4:00 pm Post subject: Re: Radiator fan does not turn on with AC |
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Howzit Alika!
Yes that's the unit I have. I've refurbished it twice already and was hoping I would not have to do it again after my Subaru swap. We'll see..
I'll trace the wires and see where they lead.
BTW, we met about 10 years ago in the parking lot of the Napa on Waialae ave. You were workin on your van. I drove the bright yellow tintop. Living in Oregon now but desperately missing that warm ocean!! |
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RufusRockwell Samba Member
Joined: July 20, 2010 Posts: 116 Location: Oregon
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Posted: Mon May 22, 2023 4:10 pm Post subject: Re: Radiator fan does not turn on with AC |
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UPDATE:
Turns out it WAS a fuse. Not blown but broken. Must have happened when I pulled it out to check it the first time. Checked it again and it pulled out but left one of its legs in the socket. Replaced and the radiator fan is now coming on with the a/c. |
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ALIKA T3 Samba Member
Joined: July 30, 2009 Posts: 6346 Location: Honolulu,Hawaii and France
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Posted: Mon May 22, 2023 5:14 pm Post subject: Re: Radiator fan does not turn on with AC |
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RufusRockwell wrote: |
Howzit Alika!
Yes that's the unit I have. I've refurbished it twice already and was hoping I would not have to do it again after my Subaru swap. We'll see..
I'll trace the wires and see where they lead.
BTW, we met about 10 years ago in the parking lot of the Napa on Waialae ave. You were workin on your van. I drove the bright yellow tintop. Living in Oregon now but desperately missing that warm ocean!! |
Howzit!
I do not remember our exchange but that's sounds right, I'm still often there, living in Palolo
Did you bring the van with you?
Good thing you've found out what it was, and an easy fix
Aloha! _________________ Silicone Steering Boots and 930 Cv boots for sale in the classifieds.
Syncro transmission upgrade parts in the Classifieds.
Subaru EJ22+UN1 5 speed transmission
http://www.thesamba.com/vw/forum/viewtopic.php?t=416343
Syncro http://www.thesamba.com/vw/forum/viewtopic.php?t=4...num+gadget |
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