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Rear Fuse Box Diagram

I'm working on putting together a Fuse Diagram for the front and rear fuse boxes. I'm about done with the front.

Having a little difficulty figuring out which fuses and single relay is in the rear. When I consult my manual, it states:
Relays in Rear [I only have one - see blue circle]:
1. Rear Window Defogger ??
2. Manifold Pressure Limiting Switch and Air Sensor Contact - - I'm guessing it's this one...

Fuses in the Rear [I have 3 - see yellow circle]:
1. ?
2. ?
3. ?

Can someone[s] identify the 3 Fuses and single Red Relay for me? thanks, Shannon

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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 09-16-2014, 02:43 PM
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Thanks to BillJam [Bill James], I was able to modify his design slightly to fit my car. Still working on it, but here is a sample:
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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 09-16-2014, 03:18 PM
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Not sure about the fuses, but ...


Pictures in the manual for earlier cars have red relay #3 in the same hole as yours.
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Old 09-18-2014, 04:45 AM
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Yeah, you can see the remnants of the double-stick tape where I had originally mounted the BL RPM Switch. So, I moved the relay up one notch.

Anyone on the three fuses? Thanks!
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Old 09-18-2014, 06:22 AM
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These diagrams are clear and very nicely done, do they exist for a 1986? If so, I'd like to purchase one. If not, does anyone have a front fuse box wiring diagram for 1986? I've got to find some power for a WEGO and am looking for where to tap in.

(sorry for the OT) - thanks.
Old 10-07-2014, 08:29 AM
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Tonger,

BillJam provided a template in Microsoft Visio Format. You'd need to have a copy of this program - It usually comes with a full-blown version of MS-Office.

I did, so was able to modify it to 1979 Specs. I'm sure Bill won't mind if I send you the Visio Template.

Just send me a PM with your email address. Shannon
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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 10-07-2014, 10:23 AM
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Quote:
Originally Posted by Tonger View Post
If not, does anyone have a front fuse box wiring diagram for 1986? I've got to find some power for a WEGO and am looking for where to tap in.

(sorry for the OT) - thanks.
I just emailed one to you.
Old 10-07-2014, 10:59 AM
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Shannon, have you figured out what the 3 fuses are at the rear as I have a little problem with my build?
Johan
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Old 10-07-2014, 01:40 PM
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My car has a wildly different layout to this. (76 930).

I've been looking into this and I'm on the verge of guessing they just slapped what ever they wanted in there on a day to day basis?

I am yet to find a wiring diagram that comes close to my fuel pump wiring?

My 3 rear fuses relate to A/C?
Old 10-07-2014, 02:05 PM
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Ok, went out and pulled the cover off the fuse area in the engine compartment. My cover has the fuses labeled in the inside of the plastic cover. It is imprint in the plastic not a sticker.

1. fan pass compartment 16A
2. fan engine compartment 25A
3. rear window heating 25A
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Old 10-07-2014, 02:14 PM
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Originally Posted by PorscheGAL View Post
Ok, went out and pulled the cover off the fuse area in the engine compartment. My cover has the fuses labeled in the inside of the plastic cover. It is imprint in the plastic not a sticker.

1. fan pass compartment 16A
2. fan engine compartment 25A
3. rear window heating 25A
I wonder if that is a carryover part from a Carrera? 930s don't have engine compartment fans.
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Old 10-07-2014, 02:40 PM
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I agree. But I have a 86 911 and the fuses are for the heater blower and the rear defrost. Would be interesting to see what other people's covers say.
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Old 10-07-2014, 03:02 PM
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My fuse cover reads...

1- Sportomatic
2- Fan
3- Rear window heating

76 930

I have no sportomatic, no engine fan, and no rear window heating. Yet all the fuses are in place?
Old 10-07-2014, 03:15 PM
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Quote:
Originally Posted by PorscheGAL View Post
I agree. But I have a 86 911 and the fuses are for the heater blower and the rear defrost. Would be interesting to see what other people's covers say.
My cover reads identically to yours (I have a 1987 Turbo) and the "engine compartment fan" fuse holder is a dummy (no wiring to it and obviously, no fuse needed in the holder).
Old 10-07-2014, 04:11 PM
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Quote:
Originally Posted by wildturkey View Post
My fuse cover reads...

1- Sportomatic
2- Fan
3- Rear window heating

76 930

I have no sportomatic, no engine fan, and no rear window heating. Yet all the fuses are in place?
Are the fuse holders wired? Like I mentioned above, my "engine compartment fan" fuse holder is not wired.
Old 10-07-2014, 04:12 PM
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All of mine are definitely wired. To answer an earlier's post; No, I have not figured these out.

I think I'll break out the wiring diagram for my car and try to decipher it. If that doesn't work, I'll just turn on ignition, pull fuses and see what I see. Then, start car, pull fuses and see what I see... Based on earlier posts, I'm betting one is rear defrost??

Was hoping someone had already figured it all out ???
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Old 10-07-2014, 04:50 PM
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I have a 81 with three wired fuses in back. IIRC one is for the rear wiper. Can't recall what the other two are for. I'll check it out and report back tomorrow.
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Old 10-07-2014, 07:15 PM
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Dog piling onto Shannon's old thread here.

I took his/Bills diagram and added the designations off my 86 930 panel.

Capture86_930

My rear panel cover appears to have been trimmed so I cant see any of the designations. Additionally the rear cover had a 911 P/N of 911.610.105.04 which makes me question its authenticity.
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Old 01-04-2015, 12:24 PM
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According to pelican that above P/N is correct for a 930 rear panel cover:

1986 Porsche 911 Turbo Coupe - Switches, Motors, Relays, Fuses & Wiring - Page 1
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Old 01-04-2015, 12:57 PM
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I had no end of trouble looking for a 76 wiring diagram. When I found anything close, it was still different to what I was looking at.

After going through and working it out myself, I discovered that my car was one of the first 400 built. This means it is has 1975 wiring.

Old 01-04-2015, 02:37 PM
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