PIC needed PLZ: SC fuse box

mr.bch · 08-02-2003, 03:38 PM

Can anyone post a good picture of what the SC fuse panel is supposed to look like. I have an 81 with a/c and p/w. Mine looks like a disaster. It has a Clifford alarm in there (messy install), extra leads for amps and stuff, etc. The 25a fuel pump fuse is missing (this is what I was looking for). I would like to get it back looking somewhat normal.

KevinP73 · 08-02-2003, 04:06 PM

Here's a pic of an '80 SC.

mr.bch · 08-02-2003, 04:23 PM

OK, here is my disaster of a fuse box. I notice on yours, you don't have an upper lead on the fuel pump 25a (6th from the left). How does this work? This is the fuse I am trying to trouble shoot.
I think I am going to jack it up and probe wires to figure this one out. It looks like maybe my fuel pump term had some problems with it and they added a 3 term block. Maybe that one is my fuel pump.

This is my least favorite part about trying to do stuff myself. Electrical and wiring. Ugh.

fred cook · fred cook's Garage

I had a similar problem and after much thought and research, this is the result. I got rid of the "old" style fuses and now use the "new" flat style fuses!

Good Luck!

Fred Cook
'80 911SC

KevinP73 · 08-02-2003, 06:26 PM

The fuse that does not have a lead on the top is connected to the adjacent fuse block from the back side of the panel. Your's should still be "hot" when the ignition is on.

KevinP73 · 08-02-2003, 06:29 PM

After taking a closer look it appears as though that 6th terminal has been severely overheated. Is the screw twisted off in there? That could explain the added fuse block up above.

david914 · 08-03-2003, 06:07 AM

Fred, I know you covered this before, but what fuse blocks did you use and where did you source them? They look very factory. What kind of modifications did you have to make to fit them? Nice job!

bell · bell's Garage

here is fred's original thread for his fuse panel upgrade.....this is something i'm thinking of tackling this winter myself

Power to the Porsche!

david914 · 08-03-2003, 08:43 AM

Thanks Bell. I was obviously too lazy to search...

This ought to be a really good upgrade as the stock fuses don't make a very good connection and heat up (sometimes 'til they literally melt!). Especially the A/C fuses.

mr.bch · 08-03-2003, 09:39 AM

Kevin, you are right, I looked closer at the fuel pump terminal and it has a bit of melted plastic around it. The new 3 terminal block must be for my fuel pump.

Fred- nice looking installation. I think I have one more item on the winter prooject list, now.

fred cook · fred cook's Garage

The fuse holders for the flat fuses came from Norway. They are made by the Zirman company and are part number ZC312. They are rated for up to 20 amp fuses. The company that carries these fuse holders is called Biltema. Their web site is www.biltema.no. The fuse holders should cost about $1.00 each plus shipping. I was able to get a friend who was in Norway to get mine for me, but I suspect you could contact the people at Biltema and place an order over the net.

I wanted a base that would mount the fuse holders as low as possible so the original cover could still be used. I built a base out of two pieces of aluminum plate and with this process, can just barely get the fuse cover over the new fuses. I have a drawing of the bracket in an excel spreadsheet and would be happy to share it with anyone interested. Just need your email address. I also have a very detailed schematic of the stock fuse panel showing where each wire goes to or comes from and which fuses are jumpered together. Rebuilding the fusebox to use the flat fuses is not very difficult, but you do need to have lots of good quality crimp on connectors, heat shrink tubing and some extra wire in various gauges to extend some of the leads. Let me know what you need and I will be glad to help as much as I can.

Fred Cook

david914 · 08-03-2003, 11:41 AM

Fred, I tried their website and either the link is bad or they're "off the air". I would like any info you can throw my way. My e-mail is d.dryden@comcast.net. Thanks!

david914 · 08-03-2003, 12:29 PM

OK, got the link to work (www.biltema.no). Seems I need to learn to speak Norwegian though! Again, any info you can send me would be great!

fred cook · fred cook's Garage

All,

I will try to get an email address at Biltema so you guys can
order the fuse holders. If my contact is still in Norway, I am sure that he will help.

Fred Cook
'80 911SC coupe

mr.bch · 08-03-2003, 06:55 PM

I would think that these would be available elsewhere, no?

Ove · 04:13 AM

Here's my original post on the subject: Fuse box solution

If anyone wants those fuse holders I'll get them for you, send me a PM.

They are $4 for a 4-block and $6 for a 6-block.
Not sure about the shipping, probably around $7-$8 to the US.

mr.bch · 08-04-2003, 08:25 AM

If anyone has a stock spare fuse base plate that they could part with, I can draw it up and would probably be able to make these, even in quantity. It would be nice to have the Porsche overall dimensions with mountings for the new fuse blocks. I don't want to disassemble mine 100% to take all the measurments. I am not exactly sure how Fred made his sub-plate to get it to fit under the stock cover, but I guess I plan on doing something similar. It would be nice to have a complete, newly made one ready to go, though.

I know one thing for sure, the finished product looks great!

Hetmann · 08-04-2003, 09:28 AM

mr.bch,

I have a spare fuse base plate that I was going to fab up and then replace the one in may car with. I can send it to you. I got Fred's drawing awhile back, but haven't spent the time to figure out what he did. PM me with your address.

fred cook · fred cook's Garage

Ok, everyone here is how I mounted the fuse holders. The base is made up of two aluminum plates. The top plate is cut so that the fuse holders (24 of them) can slide into place. The bottom plate is cut so that it just fits around the bottom flanges of the fuse holders. When the two plates are secured together, the fuse holders are securely held in place. I used some 4-40 bevel headed machine screws to fasten the two plates together. The base is held to the original Porsche fuse holder bracket using two of the original screws and their original screw holes. I covered the top plate with black duct tape before putting the two parts together for added short circuit protection. I cut out the aluminum plates with a Dremel tool and cutoff discs after scoring the design into the aluminum. I used a heavy metal straight edge and two adjustable clamps to keep the cuts nice and straight. If you want to be able to use the stock cover (I did) then this method will mount the fuse holders as close as possibe to the base. You will still have to bend the retaining loops slightly in order to allow the cover hooks to engage but it works. Total cost to make the base plate was about $15.00 for the metal and the cutoff discs. It took me about 3 hours to lay out and cut the base plates. If you have a drill press, it is easier to accurately drill the securing holes.

Let me know if you need any other info.

Good Luck!

Fred Cook

brunowil · 03-15-2019, 01:49 PM

Quote:

Originally Posted by fred cook

I had a similar problem and after much thought and research, this is the result. I got rid of the "old" style fuses and now use the "new" flat style fuses!

Good Luck!

Fred Cook
'80 911SC

hello Fred, where can I find a diagram of the sc, I have a 82 targa. Good idea to change the fuses to new models. tx