Need Help with Electrical

[scrimpsher]

I am reaching out in search of some help rewiring my 1983 911sc. I'm in Huntington Beach.

The PO HACKED UP the harness good up front and because I'm not the most patient person in the world and I'm running out of time I am in need of some help/assistance rewiring the trunk, gauges, and ignition hopefully from someone that's done it before successfully.

Not looking for OEM just great quality I can trust. This is a weekend street track car.

Please PM me if interested or have a referral.

[SpyderMike]

search for username "timmy2"

[Dmitry at Pelican Parts]

Hi scrimpsher...I've attached a link to Electrical Diagrams for the 911. I hope this works out for you and best of luck!

Porsche 911 Electrical Diagrams - Pelican Parts - Porsche 911 Parts Listings & Diagrams

-Dmitry

[gazzerr]

I've done it. It's a long arduous task but it can be done. You just have to methodically pull everything apart while labeling, photographing and documenting everything as you go. I spent about 3 months of weekends doing it but I'm slow.

If you pull the affected harnesses and send them to timmy2 he can repair or replace them like new. He does great work.

[steely]

+1 for timmy2

[scrimpsher]

Thanks I'll look him up.

[scrimpsher]

i just sent him a PM

[scrimpsher]

Advice please......

Decided to start all over from scratch and I have a couple questions.

I'm going for a minimalist approach and using a Ron Francis Black Box, 10 fuse relay system.

Fuel pump relay has 2 extra wires yellow and a red and white wire with ground do these need to be hooked up for the car to run?

Alternatively can a fuel pump be wired directly to a toggle switch through a relay? Or any other creative way. I am doing a push start system and would love to just delete the whole ignition switch to begin with. Just don't know what to do with all that wiring other than throw it in the garbage.

Besides this fuel pump what else in the truck needs to be wired for the car to start and run?

Any advice would be really appreciated. Not worried about any of the accessories, headlights, gauges, that stuff I can take care of I'm just having trouble with some of the Must Have items

[timmy2]

If you are going minimal then take out the Porsche reverse logic FP relay and install one that turns on with ignition power (switch) via a relay and install a roll over switch to kill it should you end up in that situation so it kills the fuel delivery.
Ford ranger or bronco (or similar) tip over switch will work.

You can likely sell a lot of the harness pieces in the classifieds.
Or just send them to me to use some of the connectors for new ones.

[Ayles]

Here's your inertia switch. Have one of these in my carbed SC.

https://www.pegasusautoracing.com/productdetails.asp?RecID=87

[scrimpsher]

Originally Posted by timmy2

If you are going minimal then take out the Porsche reverse logic FP relay and install one that turns on with ignition power (switch) via a relay and install a roll over switch to kill it should you end up in that situation so it kills the fuel delivery.
Ford ranger or bronco (or similar) tip over switch will work.

You can likely sell a lot of the harness pieces in the classifieds.
Or just send them to me to use some of the connectors for new ones.

Got busy and now things have cooled down and I am back at this.

Question: So..... are you saying I can bypass the air flow sensor, ect. and wire the fuel pump directly to a standard Bosh relay that I can just turn on with a toggle switch and not worry about the management of the 87/87a with the AFS? I am hoping this is doable and I can eliminate another area of possible failure in the car.

If so this is great news. I was planning on having a toggle switch to the relay and KIS. I have the roll over switch, is it ok to wire this to the switching side of the relay to avoid any further voltage drop?

Question: What do I do with the extra wires to speed rpm switch and air flow sensor?

Question: Lastly what size relay 30/40?

Thank you!