update reference info for 348 bulbs?

I had a burnt bulb in the top row of 3 lights in my rear light assembly, on a 1991 US Spec 348.
These are the lights that are on when you have the headlights up. So I would say, not brake light, but taillight?

According to this post, which is part of the 348 DIY references:
http://www.ferrarichat.com/forum/348-355-sponsored-bradan/50339-348-parts-sourcing-interchange.html#post136095762

"1156 Low for Parking and License plate lights (the non "Low" versions will melt the plastic parking light lens on 348's)

1156 regular (also 12821 Phillips) for Front and Rear Turn Signals, Tail lights, Reverse lights, and Brake lights."

So that's what I bought to do the replacement. The 1156 didn't work when I put it in.

Attached is a picture of the manual page regarding bulbs. I guess it should be a rear stop light? That's supposed to be 21W, which is close to the 1156's 25W.

Anyways, the 1156 glass is much larger than the burnt bulb I pulled out, which read:
JAHN 12V R10W 37R (E1) 00237 -n5B-

The same sized bulb I found in the 348 toolkit reads:
12821 Philips 12V5W (E1) 2AY Germany OE R5W
A picture of that is also attached. I still have to test this bulb, but I'm not holding my breath that it'll work, given where it's been living for the past 25 years.
e: the bulb works! What's wrong seems to be the burnt bulb's position. Either the wiring or the holder.

Poster ///Mike said all of his bulbs from the same position were 5W.

I have more pictures in this album: 348 bulbs - Album on Imgur

So, questions:
1. given the apparent size difference of the 1156, and that it doesn't seem to light, can we change the reference info for bulbs?
2. can anyone tell from the pictures and labels here what bulb model this should be?
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The number 1156 refers only to the type of bayonet base of the bulb. Otherwise, follow the "W" (Wattage) of the bulbs shown in the manual. 1156 bulbs up to 10 W have small glass (spherical or elongated like the 5 W bulb you showed on the picture). Higher wattage 1156 bulbs have a pear shaped larger glass. The larger bulb you show in your album next to the smaller 5 W bulb is 1157 - dual filament bulb, usually 5/21 W. 1157 bulbs are not used in the 348 euro models and neither in the US models according to the bulb chart.

Don't use 10 W bulbs for the parking lights as they may melt the plastic. The correct bulb for this position is 5 W, like the small one you show on the picture. It will work fine but you have to check the socket for any melting and movement inwards of the centre contact caused by the previous 10 W bulb. You may have to bend (pull up) the centre contact for the new bulb to work.

Also, don't use 25 W bulbs for the other positions in the tail lamps as they may cause melting; the correct power is 21 W.
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Correction: I was wrong with "The larger bulb you show in your album next to the smaller 5 W bulb is 1157"; I meant "The right dual bottom contacts bulb you show in your album next to the single contact (1156) bulb is 1157"

 

Got it -- that clears up a lot. Still, I'm used to buying bulbs by model numbers. Is there not a specific number that denotes elongated 5W with an 1156 base?

Also, how come there doesn't seem to be a listing for a 5W rear bulb in the factory manual?

 

Because Ferrari.

In truth, it's probably covered under "parking lights" since what we think of as a tail light is the rear version of a park light. In any case, without checking numbers (not with the car at the moment) the 5W lamp you pictured looks the same as what's in the top row of rear lamps in my low mile '91, which I'm betting are original.

BTW, if possible try to hunt down some German made Philips or Osram/Sylvania lamps with the silver base, since those are superior to the brass based Chinese lamps. All Osram lamps used to come from Germany, but over the past few years Chinese made versions have been showing up, still with the silver base but obviously not as well made. Not sure if you can even get that lamp in a German made version anymore, but it's worth the effort to try if you're looking for the best quality.

 

I was toying with getting a Philips 12821 Long Life, but decided against it for exactly the reason you mentioned -- how can I really tell where a certain Philips bulb came from? I wouldn't put it past a Chinese version to be stamped with Germany on it. Might as well get 2 cheap ones at the same price and hope for the best.

Now on to the harder task of figuring out why the left bulb isn't coming on.

 

It's doubtful that Philips would intentionally mismark the country of origin, but you can see a visual difference in quality between the German and Chinese lamps if you compare them side by side. Seems like I remember facing the same choice as you a while back, wanting the "long life" version (whatever that means) but not liking the fact that it was made in China. It'd be interesting to know if there is a source for German made replacement lamps-- I'd pick up some spares if there is.

As m.stojanovic said, the fault is almost certainly in the socket if the adjacent lamps work. In my experience, sockets are the most problematic link in the chain anyway.

 

Are the sockets a known failure point under normal use? Prior to my short failed experiment with the "1156" bulb, I assume that socket must have always held the right bulb.

 

But it is quite feasible that an unscrupulous company in China would mark their cheap bulbs with both "Philips" and "Made in Germany" and then sell them as being original German Philips bulbs in order to get more money for them!

 

Ferrari confusingly describe them as "Parking lights" in the manual: "C - Parking lights"
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Ah, I should have crosschecked against the diagram. Thanks!

 

Try to replace with Bosch lamps. The quality is better and sometimes you get resistance issues with cheaper ones.

 

Excellent point, Phil. I buy my lamps from large chain retailers, which presumably deal directly with Philips. However, this is a valid concern for lamps purchased on eBay, etc.

The last time I compared them side-by-side there was an obvious quality difference between the German & Chinese made Philips lamps and I'm guessing that the difference would be even more apparent on a Chinese knock-off. So it pays to examine before buying, if possible.

Interesting suggestion from Vince regarding the use of Bosch replacements. I don't think I've seen them at retailers but if anyone finds a good source for quality German made replacement lamps hopefully they will add it to this thread. Also, maybe the OP could add part numbers/descriptions and locations of the lamps he's replacing, in hopes it'll save someone some time/trouble in the future.

 

Unfortunately, I don't seem to be able to edit the OP anymore. I'd be adding a picture adapted from this post: http://www.ferrarichat.com/forum/348-355-sponsored-bradan/503412-update-reference-info-348-bulbs.html#post144273945

 

I am in need of a brake light bulb and a couple parking light bulbs for the rear. I cannot find this 1157 low that everyone is talking about nor an 1157 standard that is 21watts. I can only find 1157s that are 27 watts or more and every autoparts store I call says the phillips 67 or Sylvania 67 is the cross reference for the parking bulbs but they are 8watts. Sooo.... What to do? I don't want to melt anything.

 

Those 5W bulbs Item C & H are called parking lights. Anyhow these are them.

https://www.ebay.com/itm/New-10pcs-PHILIPS-12821-R5W-12V-5W-BA15s-Premium-Vision-Signaling-Lamp-Bulbs-USA/333635047046?epid=1163408103&hash=item4dae32ce86:g6QAAOSwefhe9Dat

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You need 1156 (1157 is not used on our Ferraris). A bit hard to find as everybody goes LED. Here are a few links:

https://www.amazon.com/Philips-Premium-Automotive-Lighting-Signaling/dp/B001V66538/ref=pd_lpo_263_t_2/138-4641813-5004850?_encoding=UTF8&pd_rd_i=B001V66538&pd_rd_r=69cb3241-046c-4aac-a9d3-04add8c6461d&pd_rd_w=BHk7s&pd_rd_wg=knqDN&pf_rd_p=7b36d496-f366-4631-94d3-61b87b52511b&pf_rd_r=4SFQZFYWQAR7R8VBXWH8&psc=1&refRID=4SFQZFYWQAR7R8VBXWH8

https://www.amazon.com/Osram-Original-Bulbs-5007-02B-Pair/dp/B071P6S5DS/ref=pd_bxgy_img_2/138-4641813-5004850?_encoding=UTF8&pd_rd_i=B071P6S5DS&pd_rd_r=07927336-4d96-4a90-a53d-b019464164a2&pd_rd_w=EsrYz&pd_rd_wg=J5Uc4&pf_rd_p=ce6c479b-ef53-49a6-845b-bbbf35c28dd3&pf_rd_r=SA8R8EH6Q7ZVXBFT9PWE&psc=1&refRID=SA8R8EH6Q7ZVXBFT9PWE

https://www.ebay.com/itm/12v-21w-Light-Bulb-BA15s-1156-Base-Larger-Size-Glass-/292883797167

 

Where can you get 12821s locally? Also 5007s look identical, are 5w, and can be gotten locally at any auto parts store. Can 5007s be used?

Also I meant 1156s for the brake lights instead of 1157s. I think 1157s are dual filament bulbs..

 

Any bulb with the 1156 base can be used like the 12821's. Auto parts stores have them or can order them for you or just order them online. You have a few link's above.

I got 1282's at pep boys. As far as local to you.... call around.

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Did you mean you got 12821s at pep boys? You wrote 1282s.

 

Yes 12821, auto correct. They are easy to find. They are bulbs, I've got a stack of them. Just use Amazon and be done. Good luck!

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I like to be able to walk into a store and grab parts when i need them. Thats why i was looking for interchange part numbers. I had found them on ebay and other online stores immediately but thats not what I really wanted so I came on here hoping for some better results for some more readily available parts. Ill try pep boys and bap auto. Autozone, O'Reilly and advance dont have the 5w bulbs in that part number so i was trying to see if 5007s would work or where to get the correct bulb. I appreciate the help.

 

Try NAPA

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Pep boys no longer sells parts after new ownership! Parts authority in stock has the 12821s though.

 

Well, these (incandescent) bulbs are already vintage so many parts shops are no longer willing to keep them in (very slow moving) stock.