Jeff Bowlsby

Eager to see the 1981 diagram when you can get to it.

Alan

Well I'm not surprised its confusing - but is actually really interesting data to have that is normally quite obscured. for the early panels all the fuse inputs (as show on the diagrams) are the bottom connections. As you surmised the red are direct battery bus (30) connections (always live), the black are ignition bus (15) connections live with ignition switch in position 2&3 (of 0-3), and the Yellow are accessory bus (X) connections live with ignition switch in positions 1-2 (of 0-3). These busses plus (50) the starter output of the ignition switch (3 of 0-3) are shown across the top of every diagram of the current flow type (1977-1983). The other uncoded (background green color) fuses are none of these, they may be fed by relays, switches or other equipment. They may be live only under certain functional conditions (varies). I could have - but I made a concious choice to keep those clean and create a separate line below the fuse/description for 1977-1984 and above for 1985-1995 to match the relative fuse input connection location. This decision was driven mainly by the later panels that have 5 fuse blocks color coded in alternating black & white - its a helpfull means of keeping track of the sequence position, and relates directly to the numberingI think I will change the color so it stands out better, but I want to use the relay text color for other purposes soon. I added the Arabic numbers because people don't "see" number sequences with roman numerals - they generally translate each one individually - Porsche (stupidly IMO) sequenced the relays in a very odd way and I want people to see that more obviously at a glance. That also why I don't like a separate list of relays - the mapping gets screwed up too easily with the Porsche sequencing M: means manual, A: means Automatic The broken blue line shows that the relay for (A) is compatible with others however the metal bridge for (M) obviously is not Plug terminals are nothing to do with the relays - they are for the 25 Plugs across the bottom - the ID numbers for CE panel plug connector pins - they are embossed on the panel but very small - most people don't notice them. e.g. if you see "Z3" listed as a CE connection what pin is that? if you see "A8" listed which pin is that. Note - you can't see the embossed labels when the plugs (or below: relays) are plugged into the panel anyway.

For the relay sockets (terminals 1-9)- the panel also has embossed labels - however these are very very tiny indeed - most people who even look for them don't see them. It is helpful to establish the pin numbering to a standard (and Porsche already did this but didn't really publish it) - there then needs to be a mapping to common SPST/SPDT relay usage elsewhere (this part is not year specific so doesn't really belong here - will be done, I have a version of it already). Note that not all relay sockets have all these terminal slots (some do, some slots are unpopulated with terminals) and certainly not all relays have all these pins either. Some Porsche special function relays use these exact pin labels while others use functional lables or a mixture of both. Generic Bosch style SPST & SPDT always use functional labels |(30)| - As above (30) always has a specific meaning - it is the direct battery connection to the panel (in this case direct from the jump post) - 3 large blade type terminals.

The questions were good - I'm sure others are confused also. Unfortunately to get to one single sheet per year certain assumptions & simplifications must be made - since these will all be consistent they can be explained in a single overview with this type of content - I had anticipated it would be needed but have not done it yet ... lets see what else is not clear to figure out what is needed. They generally follow Porsche conventions so many will 'get' it. More details on these conventions exist in my Wiring Diagram Primer document.

Alan

Alan

I have a version of all of them, but I'm reluctant to share when it is likely that systemic issues will need to be corrected for all of these. I'll clear those up first and rebuild all the diagrams.

For example Roger has identified that the original stock relays have superseded versions - this will change all diagram's content. I'd prefer to have very few diagrams that are known to be incorrect circulating around.. I will color code the whole page to indicate diagrams that are final enough for distribution when we get to that point.

Alan

ROG100

Alan,
All are good apart from these additions - couple of numbers are not good.
Roger

141.951.253.B
1H0.953.227
431.951.253.G
928.612.473.00
928.615.111.00
928.615.113.01
928.615.114.00 = 928 615 114 01
928.615.115.00
928.615.116.00
928.615.117.00
928.615.117.02
928.615.119.01
928.615.123.00
928.615.124.01 = 928 614 124 03
928.615.125.00
928.615.125.01
928.615.126.02
928.615.127.00
928.615.137.01
928.615.203.00
928.618.102.00
928.618.105.00
928.618.107.02 = 928 618 107 05
928.618.107.04
928.618.108.00 = 928 618 108 01
928.618.108.01
928.618.109.00
928.618.109.01
928.618.111.00
928.618.113.01 = 928 618 113 02
928.618.115.00
928.618.221.00 = Not a good number
928.618.223.00
928.618.225.01
944.615.119.00
944.615.166.00 = Not a good number
993.615.101.00 = 993 615 101 01

Alan

Roger

Both of these were garbled in my source material - well caught sir!

928.618.221.00 got subsituted somehow from 964.618.221.00 (speedo converter)

944.615.166.00 I believe it was a transcription error 944.615.116.00 seems to be correct - 944 window regulator.

Alan

Alan

Roger

I don't think these are equivalent functions: 928.618.107.02 = 928 618 107 05

Early (pre-S4) headlight relay and S4+ headlight relay

They use different motors (uni-directional vs reversing) and have different limit switch configurations...?

Alan

martinss

Alan: Could I suggest that you use a version number and update date rather than colour-coding. It is likely that over time there will need to be further updates as part numbers change.

And maybe indicate original p/n and current replacement (perhaps in italic).

Great work of benefit to the community - thank you.

Alan

They will indeed have version & date.

The original spec. relay and current superseded version will indeed both be shown.

Alan

ROG100

964 618 221 00 is a good number with no SS
944 615 116 00 is a good number with no SS

Early 80 to 86 light double relay = 928 618 107 00 & 928 618 107 02 and both SS to 928 618 107 05
Later 87 to 95 light double relay = 928 618 107 04 current number with no SS
UK (dim/dip) double relay 928 618 107 01 only used 87 to 90. Later cars used 928 618 107 04

Alan

Good thanksOK my mistake - yes I see that now...
Do you know on what years 107.00 & 107.02 were installed as stock?

I assume 107.00 came first from 1980-19?? and 107.02 was from 19??-1986

I don't have sufficient info to make a chart for all years of early ROW cars, but can do it for S4 & later which varied only slightly. Will add this to the project list (at the end!).

Thanks for all the help

Alan

ROG100

Quick answer is I do not know specifically - info is not backward helpful.

I certainly can help with that

Alan

Roger (all?)

Are these still active numbers for intermittent wiper relay?

928.625.101.00
928.625.101.01 Assume this superseded .00

I know 993.615.101.01 is an alternate here does it also now supersede both of these..?

Alan

ROG100

I assume you mean 928 615 101 00 & 928 615 101 01 - both currently SS to 993 615 101 00 and then to 993 615 101 01

So many numbers so little time 8>)

Alan

I'm glad you are a mind reader (finger trouble) - yes exactly that - thanks.

Alan

syoo8

Since this thread is turning out to be a good one...

Can the OP please correct the spelling of the title, for the sake of future Rennlisters?