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Date:         Sun, 27 May 2012 10:36:10 -0700
Reply-To:     mark drillock <mdrillock@COX.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         mark drillock <mdrillock@COX.NET>
Subject:      Re: Rear Wiper Relay: Use 171 955 529? Pre '90 Headlight SW
              Change; Handle more Amps? (1988 Westy)
Comments: To: Loren Busch <starwagen@GMAIL.COM>
In-Reply-To:  <CAH32RNYeA1LqyBshYrKm-oLMh9hNc8-18MJb9kKxJAuTPxRK_A@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed

Loren, the important difference isn't for version B - M swaps, but for version T swaps. According to VW parts data the version T headlight switch is for certain of the last Vanagons made but the exact serial number when it was introduced is given very differently in different places in the same VW documentation. To see if your dash harness needs the later T version switch you would have to look at the wiring going to the switch. According to the Bentley diagrams the later T version wiring has a wire to pin 58e while the majority of Vanagons have no pin 58e with a wire to it. My early 90 Syncro has the older wiring to the switch and no pin 58e. (my 90 vin# L 28,xxx)

There are still other letter versions of the switch not mentioned yet.

Neil was really looking to know if the version M replacement for version B was a stronger improved one and that I can't answer.

My post was to warn people who might be tempted to use the cheaper, easier to find early versions of the switch in their later wiring that they would be bypassing important fuse protection if they did so.

My best guess is that the headlight switch wiring was changed to allow DRL system flexibility. Since DRL was a Canadian thing at that point in time the switch/wiring change may depend in part on which market the particular Vanagon was intended for.

Mark

Loren Busch wrote: > RE: Headlight Switch Later Models > Okay Mark, got that. Now a follow on question. Since it appears that a > '90 Vanagon could have either the B or M suffix switches originally (and > corresponding wiring) but either will appear to work correctly (but no fuse > in dash light circuit if B used where M should be) then how does an owner > of a '90 Vanagon check to see which is correct? This assumes that a PO may > have put in a B where an M was originally. How can you tell which is the > correct switch? > BTW I'm asking because I think I may have done exactly that some years > back, put in a B when an M failed. >


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