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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
Posts: 13,634
Rewiring an old bastardized 74 911.

The title pretty much covers what I need. I would like to find a PDF of a 1974 911 wiring diagram. Any online resource anyone can point me torward or something you have on your own computer?

I bought a car last year that was all done up to look like a DP 935. In addition to the front end wiring that was altered for that, the car has an 80's era Clifford alarm with ignition kill, a Fosgate amp and not 1, but 2 VDV players and a 10 speaker system. Needless to say things are less than pretty and I have starting issues with the car. We have reverted the car to IB and things like fog light wiring are just plain missing now.

The plan is to go through and strip out anything that's not original to start with and see where that leaves me. If I need to make my own wiring harness for some or all of it, I will, but I need to wiring diagram to get started. Any help is greatly appreciated.
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule

Last edited by Matt Monson; 08-17-2017 at 05:37 PM..
Old 04-21-2017, 02:36 PM
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ROW '78 911 Targa
 
timmy2's Avatar
 
Join Date: Jul 2011
Location: Salem, OR
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Here ya go:
https://www.dropbox.com/sh/s292jtsyvl6llw2/AABF-ofgMfoMltGa99Asphr5a?dl=0
Extras like fog lamps etc:
https://www.dropbox.com/sh/hr6dquonkwjp23a/AABjbboPo-4J2L9nBoC5tbh6a?dl=0
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Dennis
Euro 1978 SC Targa, SSI's, Dansk 2/1, Bitz kit EFI.
Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds.
Old 04-21-2017, 03:19 PM
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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
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Dennis, you're my hero. Thank you. Next time I'm at a real computer I'll dump that stuff.
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 04-21-2017, 05:27 PM
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ROW '78 911 Targa
 
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Join Date: Jul 2011
Location: Salem, OR
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Download it to your phone too Matt. Opens nicely in a reader for quick reference.
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Dennis
Euro 1978 SC Targa, SSI's, Dansk 2/1, Bitz kit EFI.
Need a New Wiring Harness? PM or e-mail me. Search for "harnesses" in the classifieds.
Old 04-21-2017, 07:41 PM
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Charles Freeborn's Avatar
 
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Location: Portland, OR
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I've got a 74. Let me know if you need photos or specifics.


Sent from my iPhone using Tapatalk
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Bone stock 1974 911S Targa. Kickin' it old school.
Just because you can doesn't mean you should...
Old 04-21-2017, 09:28 PM
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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
Posts: 13,634
This is going to be unpleasant. I spent an hour poking around this morning. I also broke down and bought a complete set of factory manuals. I've owned the early stuff and 914 stuff for many years. Now that I've got an IB project it was time. More to follow as I dig into it. I'm just going to make this my electrical project thread.




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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-16-2017, 10:46 AM
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nice.

i look forward to following this one. i'm about to tear into a similar situation on a '74 i bought last year. the 2.7 that came with the car is all updated and looks to be in good shape.

the electrical? not so much...
Old 08-16-2017, 12:07 PM
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matt, gotta ask.

what CD player is that above the fosgate EQ? CDX-80?

what, 1989? i was rocking one of those when i lived in your neck of the woods...
Old 08-16-2017, 02:52 PM
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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
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I'll look next time I go out.
August of 1989 I had just graduated high school in San Mateo, CA. I was working for an auto broker and running around in an RX7.
__________________
1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-16-2017, 03:15 PM
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When I bought my '74 a few years ago, the wiring was a mess. Clifford alarm was tied into everything. Most things didn't work. Took out the seats and steering wheel and put a chaise lounge pad on the floor of the drivers side. Flooded the under dash area with light and spent my days on my back! I bought a laminated wiring diagram on ebay. Best $20 I spent. Easy to follow even with my old eyes. COLOR Wiring Diagram 11x17 for 1974 - 1975 Porsche 911 | eBay
Good luck,
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Tony
1968 912 Softwindow Targa
1974 911 Lime Green Targa
2013 Cayenne GTS Meteor Grey
2003 Boxster S

Last edited by Tony V; 08-16-2017 at 04:08 PM.. Reason: spelling
Old 08-16-2017, 04:07 PM
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gearhead
 
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Tony
That's kind of the plan. I was just looking around familiarizing myself and decided the seats need to come out. And the bumper may come off at some point too.
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-16-2017, 04:14 PM
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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
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Quote:
Originally Posted by dwelle View Post
matt, gotta ask.

what CD player is that above the fosgate EQ? CDX-80?

what, 1989? i was rocking one of those when i lived in your neck of the woods...
Yes, CDX-80. You want it?
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-17-2017, 12:03 PM
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Now Available for Ordering:   101 Projects For Your BMW 3 Series 1982-2000  [more info]
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ha!

i actually still have mine!...
Old 08-17-2017, 01:02 PM
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gearhead
 
Join Date: Nov 2007
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I was an Alpine guy. I think I have 3-4 old Alpine players, an old Sony amp and maybe even an EQ.
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-17-2017, 01:32 PM
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Functionista
 
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Shazam! What a project.

You are welcome to raid my 74 parts car for front section of harness. Or the entire harness if needed. Might speed it up though they are a pain to pull in their entirety.
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Jeff
74 911, #3
I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible.
Old 08-17-2017, 05:30 PM
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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
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Wow Jeff, Thats super kind of you. I have no interest in pulling the whole harness. Did that a few times on Subarus. No thanks.

But I will possibly take you up on the front lighting section. Started in on the car in earnest tonight and that section is super hacked. The alarm and stereo is tedious but its largely removing non-factory stuff and patching some splices. When its cut out and just plain missing its another story.

I'll post pictures and details in the morning. And a couple questions.
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-17-2017, 08:36 PM
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Functionista
 
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Sounds good. I located another partial wiring harness from a mid-year so I can compare it to pics.
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Jeff
74 911, #3
I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible.
Old 08-18-2017, 07:44 AM
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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
Posts: 13,634
Good Morning,

I managed to get a couple hours in after work last night while my daughter played in the yard. Multitasking. First order of business was to remove the passenger seat.


Found amp wiring under there and started ripping it out. I was happily surprised to see the blue when I pulled up the side carpet. We painted the car without a COA and just based on scratches to original we had found elsewhere. The car was on it's 3rd paint job before my guy stripped it. I think we made the right call on color.


Then I pulled out that whole center console from a later car (which was originally white!) and cleaned that up a bit.



The dilemma I now face is the AC. It actually appears that maybe it was a factory AC car? But this gives me pause.

The prodate on this connector for this relay is 1988. And it's just out there in the open in the frunk. Did someone add the complete set up, including wiring, do install a later one into this car?

For now, I have started ripping out flapper boxes and accordion hose because it's got wiring all wrapped around it. Unfortunately I also think I may have to remove the gas tank. There's some wiring pinned under the fill pipe from when the painter put the thing back in. Oh well. Car needs new fuel lines too, so why not...
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-18-2017, 09:19 AM
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gearhead
 
Join Date: Nov 2007
Location: Loverland, CO
Posts: 13,634
Oops. Forgot my second question in addition to the AC curiousity. Is this for an antenna that someone routed up the windshield pillar and into the headliner? I'm thinking I just tuck it away when I put things back together. I don't want to mess with the headliner since it's nice and solid and not sagging or ripped.
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1974 911 Restorod
1974 914 Bumble Bee
1975 911S Tom's Targa
2008 Cayman S Mule
Old 08-18-2017, 09:28 AM
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Functionista
 
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I was slammed yesterday but I did bring home that extra harness. I'm going to compare it to your pics this morning. I bet the AC stuff was added later...

I'd leave the headliner alone for sure.
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Jeff
74 911, #3
I do not disbelieve in anything. I start from the premise that everything is true until proved false. Everything is possible.
Old 08-19-2017, 05:31 AM
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