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Ludwig2691
Samba Member
Joined: September 13, 2017
Posts: 5
Location: Peoria Illinois
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 Posted: Thu Oct 15, 2020 8:58 pm Post subject: 85 vanagon power steering wiring |
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| Hey there, I recently bought an 85 tin top with the original 1.9 digijet. Towed it home and started digging into the engine. Quickly found out that all the wiring had been fried, don’t know how or why. Got most of the harness replaced but I can’t figure out where the black wire from the “power steering idle boost solenoid” goes to, as it was completely gone. If anyone can help me, I would appreciate it. I can’t find info anywhere!!! I have the brown wire going to the actual Ps switch, but I don’t have any clue where the black wire goes... sorry to sound redundant |
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ALIKA T3
Samba Member
Joined: July 30, 2009
Posts: 6360
Location: Honolulu,Hawaii and France
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| Posted: Fri Oct 16, 2020 12:29 am Post subject: Re: 85 vanagon power steering wiring |
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The black wire is +12Vdc in your junction box in the engine compartment.
It goes to the solenoid valve. The ground goes from the solenoid valve to the PS switch, and from the switch to actual ground. When the pressure switch closes the contact, it ground the solenoid valve, and opens the air by-pass.
If you have AC, it`s 2 valves, same logic with Y connectors for the hoses.
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Ludwig2691
Samba Member
Joined: September 13, 2017
Posts: 5
Location: Peoria Illinois
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| Posted: Fri Oct 16, 2020 5:30 am Post subject: Re: 85 vanagon power steering wiring |
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| I appreciate it! Do you by chance know exactly where the black wire would connect to in the junction box? I’m afraid to connect to the wrong thing |
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Crooked Designer
Samba Member
Joined: March 22, 2018
Posts: 323
Location: Chicago, IL
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| Posted: Fri Oct 16, 2020 7:20 am Post subject: Re: 85 vanagon power steering wiring |
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Trying to follow along as I have an 85. So I tried to find the power steering wiring in the Bentley and am having no luck. If anyone knows where to look, I can post a pic.
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'85 Westy full camper, Subaru 2.5L, 5 speed SubiGears + 5speedbus shifter kit |
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Ludwig2691
Samba Member
Joined: September 13, 2017
Posts: 5
Location: Peoria Illinois
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| Posted: Fri Oct 16, 2020 8:11 am Post subject: Re: 85 vanagon power steering wiring |
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| A picture would be perfect, also I deleted the a/c and a/c booster. |
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Crooked Designer
Samba Member
Joined: March 22, 2018
Posts: 323
Location: Chicago, IL
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| Posted: Fri Oct 16, 2020 8:42 am Post subject: Re: 85 vanagon power steering wiring |
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| Ludwig2691 wrote: |
| A picture would be perfect, also I deleted the a/c and a/c booster. |
This what you're looking for?
_________________
'85 Westy full camper, Subaru 2.5L, 5 speed SubiGears + 5speedbus shifter kit |
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Ludwig2691
Samba Member
Joined: September 13, 2017
Posts: 5
Location: Peoria Illinois
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| Posted: Fri Oct 16, 2020 9:56 am Post subject: Re: 85 vanagon power steering wiring |
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| That is helpful but I still don’t know where to connect the black wire to. A picture of someone’s 85 engine bay would be superb |
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ALIKA T3
Samba Member
Joined: July 30, 2009
Posts: 6360
Location: Honolulu,Hawaii and France
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MarkWard
Samba Member
Joined: February 09, 2005
Posts: 17153
Location: Retired South Florida
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| Posted: Fri Oct 16, 2020 1:25 pm Post subject: Re: 85 vanagon power steering wiring |
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The last 1.9 I worked on, that wire connected to the +side of the coil. Not in the black box. This van had AC.
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Ludwig2691
Samba Member
Joined: September 13, 2017
Posts: 5
Location: Peoria Illinois
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| Posted: Fri Oct 16, 2020 2:43 pm Post subject: Re: 85 vanagon power steering wiring |
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| Replying to both comments, I believe the the black ignition wire in the box connects to the coil so it should be able to connect to either in or out of the box and it should be fine??? Also should I add the fuse? |
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dhaavers
Samba Member
Joined: March 19, 2010
Posts: 7757
Location: NE MN (tinyurl.com/dhaaverslocation)
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| Posted: Fri Oct 16, 2020 5:38 pm Post subject: Re: 85 vanagon power steering wiring |
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$1 to the first one to mention adding a 7.5A to 10A fuse to the PS idle boost wiring...???
(Probably what led to your harness being burnt...the FIRST time...???)   <shrug>
https://www.thesamba.com/vw/forum/viewtopic.php?t=692179
- Dave
_________________
86 White Wolfsburg Westy Weekender
"The WonderVan"
<EDITED TO PROTECT INNOCENT PIXELS> |
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ALIKA T3
Samba Member
Joined: July 30, 2009
Posts: 6360
Location: Honolulu,Hawaii and France
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| Posted: Sat Oct 17, 2020 6:06 pm Post subject: Re: 85 vanagon power steering wiring |
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| Ludwig2691 wrote: |
| Replying to both comments, I believe the the black ignition wire in the box connects to the coil so it should be able to connect to either in or out of the box and it should be fine??? Also should I add the fuse? |
Correct, the black wire at the coil doesn`t come off the sky, it is in the black box as well 
_________________
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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MarkWard
Samba Member
Joined: February 09, 2005
Posts: 17153
Location: Retired South Florida
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| Posted: Sun Oct 18, 2020 5:06 am Post subject: Re: 85 vanagon power steering wiring |
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Fuse would be optional. The digijet power steering pressure switch completed a ground for the idle valve. The power supply to the valve was routed that it would not likely short.
The digifant pressure switch had power to it and completed the power path. It was more likely to short if the terminal insulator fell off and the wire touched a ground. So a fuse would be an improvement on the later van.
Adding a fuse won’t cause a problem. Also I know the power doesn’t come from the sky to the coil. The wire I was dealing with had a female spade connector that easily connected to the terminal on the coil.
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SyncroHead 
Samba Member
Joined: May 23, 2005
Posts: 1145
Location: Northern Nevada
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| Posted: Sat Mar 20, 2021 8:51 am Post subject: Re: 85 vanagon power steering wiring |
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| Crooked Designer wrote: |
| Ludwig2691 wrote: |
| A picture would be perfect, also I deleted the a/c and a/c booster. |
This what you're looking for? |
(Photo omitted)
No. Just thought I'd add a note for future readers. That page in the photo is for the later Digifant engines, not a 1985 with Digijet control.
I'm working this same issue for my 1985 and found that wiring for the power steering idle boost valve is not documented in Bentley. I've searched pretty thoroughly and would love to be proven wrong if anyone else can find it.
My 1985 has both A/C and PS but has only one idle boost valve. I suspect a PO removed the one for the A/C at some point, since the mounting bracket for it is still there. Bentley does show the wiring for the A/C idle boost valve on page 97.138.
Jim Davis
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| sphet wrote: |
| I have *no* idea what the previous owner carried in his Westy... angry donkeys? |
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Steve M.
Samba Member
Joined: July 30, 2013
Posts: 6833
Location: Fort Lauderdale, Fl.
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| Posted: Sat Mar 20, 2021 10:00 am Post subject: Re: 85 vanagon power steering wiring |
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PAY Attention to this thread or pay in other ways! 
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There are seven days in a week. Someday is not one of them. |
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MarkWard
Samba Member
Joined: February 09, 2005
Posts: 17153
Location: Retired South Florida
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| Posted: Sun Mar 21, 2021 8:24 am Post subject: Re: 85 vanagon power steering wiring |
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A dealer installed AC in a digijet vanagon may not have the factory valve.
PS if I only had the one valve, I’d utilize it for the AC, not the power steering. No comparison in engine load. AC is a much bigger constant load.
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