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Date:         Thu, 29 Nov 2007 06:40:28 -0800
Reply-To:     Mark Drillock <drillock@EARTHLINK.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mark Drillock <drillock@EARTHLINK.NET>
Subject:      Re: AC 3rd speed fan wiring
Comments: To: Joe Federici <joefederici@EARTHLINK.NET>
In-Reply-To:  <7D4186A0-3FBC-433B-9333-0110908E2977@earthlink.net>
Content-Type: text/plain; charset=us-ascii; format=flowed

Joe, there is no important difference between the 86-88 and 89-91 rad fan wiring section of the A/C. Note that the fan wiring pages in the Bentley have labeling errors for all 3 versions of the larger fan. In spite of that all wires are shown and you should be able to do this with minor hair pulling.

The biggest difference in the 2 versions of the A/C wiring itself is for the 2 Freon pressure switches. The early version has 2 pressure switches with 2 separate connectors of 2 wires each. The later version has these combined into a dual pressure switch with 4 wires together.

My understanding was that you were installing some other A/C system and thus you don't need the VW A/C wiring and can separate the fan wiring from it by unplugging a 2 wire and a 1 wire connector. The one wire is a small red/blue stripe and the 2 wire is a large red/black and small black/yellow.

Mark

Joe Federici wrote:

> Thanks Mark, Is there an easy way to tell which year my AC wiring > came from. I do have what looks like a complete set of the fan wiring > but as for the year I'm a bit fuzzy as I'm not the person who pulled > it out. > > JFF > > On Nov 28, 2007, at 9:35 PM, Mark Drillock wrote: > > Your Syncro already has the "third" fan speed and the relay for it. What > you are missing is the second speed with it's relay and wiring. The > diagrams can be confusing about this since the 2 speed version calls > full speed the 2nd speed and the 3 speed version calls full speed the > 3rd speed. > > Assuming that you pulled the complete fan wiring sub-harness from your > 86+ A/C donor it should be straight forward to remove the lo/hi version > fan wiring and install the low/med/hi wiring in it's place. VW made this > area of the wiring flexible by design so they could use any of 3 fan > wiring schemes without needing different main harnesses. It is plug and > play. > > You need to unplug the Syncro fan harness illustrated on Bentley 97.200 > and replace it with the A/C fan harness illustrated on 97.141. Dash out > will be helpful. No wires need be cut. Everything unplugs. > > Mark > > > > Joe Federici wrote: > >> Does anyone on the list have experience adding the factory AC wiring >> to a non-AC van. The only part I'm interested in is the 3rd speed >> radiator condenser fan and which wire triggers it. >> >> I'm going to be using a different condenser and evaporator and just >> need to wire in the needed relays or wiring to activate the fan and >> wire it into my system so it comes on with the compressor. I've got >> all the wiring and relays from a parts van that had AC but I'm having >> trouble figuring out what I need and don't need. My van is a 1987 >> syncro transporter so I've already got the fan used for the AC vans. >> Looking at the manual I think all I need is to add the 2nd and 3rd >> stage fan relays. One looks to be above the fuse panel and other is >> behind the left fresh air vent but I'm not sure about the trigger >> wire that activated the 3rd speed. >> >> If any knows please pmail me, >> >> thanks >> >> JFF >> >


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