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Author Topic: 24v Headlight  (Read 577 times)
richard5933
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« on: November 19, 2017, 04:57:52 AM »

Trying to find replacements for our sealed beam headlights. Not interested in upgrading to LED, just wanting to replace 40-year-old lamps with new.

Manual shows 4619 & 4624 as part numbers. Anyone know of a current  part number for these?

Since the bus is 24v I can't just walk into a local parts store to buy them.

Thanks.
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Richard
1974 GMC P8M4108a-125 (Current Bus)
1964 GM PD4106-2412
Located in beautiful Wisconsin
KD9GRB
Geoff
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« Reply #1 on: November 19, 2017, 06:06:05 AM »

I found the first one on eBay, didn't check the second number.
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Geoff
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Ed Hackenbruch
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« Reply #2 on: November 19, 2017, 06:33:10 AM »

The PO of my bus put a 24v to 12v converter on the floor by the steering column and ran 12v headlights off of it....lots of times i would rest my foot on it while going down the road. Smiley
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1968 MCI 5A with 8V71 and Allison MT644 transmission.  Western USA
chessie4905
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« Reply #3 on: November 19, 2017, 07:21:51 AM »

If you look in the compartment under driver, look at ceiling of compartment just right of steering column. There should be several wires with plugs that stick down about 6 inches and the plugs are connected to each other. If yours is that, GM made a resistor panel that bolts to floor (two small holes should be there). The pael is about 10 inches long and about 5 inches wide. Has several resistors mounted horzontally. This was an option to be able to use 12 volt headlights. Just plug and play. Check with Luke; maybe he can get you a take off.

You can also use this: https://www.amazon.com/Pyle-PSWNV720-Power-Converter-Technology/dp/B003P17X8I


I just did some searching and 24 volt sealed beams are hard to find anymore. Not a problem just a couple of years ago. Again, check with Luke.
They make LED versions that will operate at 12 to 28 volt now. Expensive in 5 3/4 size. I think I'm going to upgrade to them due to difficulty in getting the regulars anymore. Also the brightness and beam pattern is going to be much better than the old type.
MCI got around this by wiring their headlamps in series using 12 volt in a 24 volt system. Only down side is, is that if one goes out, both will go out, not the best idea in some driving situations. I got a resistor panel from my parts bus, but someone cut the plugs off, so will take some time to repair, trace wires and install new plug/ sockets.
« Last Edit: November 19, 2017, 07:53:41 AM by chessie4905 » Logged

GMC h8h 649#028 (4905)
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thomasinnv
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« Reply #4 on: November 19, 2017, 07:46:21 AM »

If you still need 24v lamps, Napa can order them for you.

Sent from my SM-G930T using Tapatalk
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Some are called, some are sent, some just got up and went.

1998 MCI 102-DL3
Series 60 11.1/Alison B500
95% converted (they're never really done, are they?)
chessie4905
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« Reply #5 on: November 19, 2017, 08:05:41 AM »

Just found this:.
https://www.zoro.com/search?categoryl1=Auto+%26+Truck+Maintenance&variants.attributes.4264=28&categoryl2=Automotive+Lighting&categoryl3=Automotive+Lamps+and+Bulbs&q=
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bevans6
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« Reply #6 on: November 19, 2017, 08:37:01 AM »

I use Cibie quartz halogen lights with 24 volt bulbs, rather excellent to be honest.  Daniel Stern carries the 24 volt bulbs.  https://www.danielsternlighting.com/products/products.html
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1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
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scanzel
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« Reply #7 on: November 20, 2017, 03:31:12 AM »

Did you try some of the military surplus guys out there. Should be some out there as many guys restore old military vehicles. Now the military is going with led.
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Steve Canzellarini
Berlin, CT
1989 Prevost XL
chessie4905
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« Reply #8 on: November 20, 2017, 03:38:32 AM »

Majority of military is 7 inch round.
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GMC h8h 649#028 (4905)
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scanzel
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« Reply #9 on: November 20, 2017, 06:35:14 AM »

What size round is he looking for, I saw 7" and 9" on Ebay.
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Steve Canzellarini
Berlin, CT
1989 Prevost XL
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« Reply #10 on: November 20, 2017, 06:52:45 AM »

Try construction equipment suppliers a lot of road construction equipment is still 24V!
Grin  BK  Grin
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Lin
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« Reply #11 on: November 20, 2017, 09:28:36 AM »

I switched to Hella Europe type some years ago.  The kits came with 12v bulbs but I bought the 24v bulbs separately. They are big improvement over the originals.
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« Reply #12 on: November 20, 2017, 09:54:14 AM »

Richard,

I think I have at least one 24 VDC headlight I bought from Luke a few years ago.  You are welcome to have it(them) for the postage.

PM me for address.  I probably wont be able to find it in the garage until Thanksgiving.

Steve
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Steve Toomey
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richard5933
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« Reply #13 on: November 20, 2017, 11:08:17 AM »

I ended up just ordering a new set from Luke. One day maybe I'll have the patience to do more research on other options, but for now this ended up being the easiest approach.

Richard
1974 GMC P8M4108A-125 (Current bus)
1964 GM PD4106-2412 (totalled Sept 2017)
Located in beautiful Wisconsin
KD9GRB
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Richard
1974 GMC P8M4108a-125 (Current Bus)
1964 GM PD4106-2412
Located in beautiful Wisconsin
KD9GRB
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