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Author Topic: New Tail Lights  (Read 1811 times)
will4104
Will 4104
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« on: July 02, 2013, 03:42:55 PM »

Hi Everyone!

Needed to replace my tail lights, but the new ones I purchased have three wires while the existing have two. Am I correct to assume the third is for ground: since the old one was metal and used the housing as ground?  (new ones are plastic housing, led)
If someone in the know will chime in, I will thank you ahead of time.
Thank you all for the help. I, as well as many, are glad you are all here!
( attempted to post pics, not edumacated enough to accomplish it... )

Will

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William Fenske
4104-716
Altamonte Springs, Fl.
RJ
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« Reply #1 on: July 02, 2013, 03:46:16 PM »

Will -

What color wire are the leads on your new lights?

That will help us answer your question more intelligently.

 Wink
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RJ Long
PD4106-2784 No More
Fresno CA
will4104
Will 4104
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« Reply #2 on: July 02, 2013, 03:50:37 PM »

The wires are red, black and white. The white wire has an eyelet on it while the others are bare...   Cry
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William Fenske
4104-716
Altamonte Springs, Fl.
wagwar
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« Reply #3 on: July 02, 2013, 03:54:10 PM »

The white is ground.
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Cary and Don
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« Reply #4 on: July 02, 2013, 05:10:53 PM »

Usually if there are three wires, one is stop and one is tail light.

Don and Cary
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1973 05 Eagle
Neoplan AN340
gus
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« Reply #5 on: July 03, 2013, 03:44:06 PM »

I think the original 4104 had separate stop/tail/turn lights. If so you probably don't use one of the wires.

Three wires are needed when the stop/turn/tail lights use the same two contact bulb. Your old ones are probably single contact.
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PD4107-152
PD4104-1274
Ash Flat, AR
will4104
Will 4104
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« Reply #6 on: July 03, 2013, 03:59:11 PM »

Thanks all,
Does anyone know how the lights operated originally? Right now both top and bottom act as stop and turn...
Any opinions on having tops and bottoms act independently, tops for turns bottoms for stops?


Will
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William Fenske
4104-716
Altamonte Springs, Fl.
Ed Hackenbruch
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« Reply #7 on: July 03, 2013, 07:45:24 PM »

If you tow anything the bottom lights will not be visible to anyone behind you, and if for some reason the lights on the tow quit working and you have to stop suddenly, you may find yourself becoming acquainted with the driver behind you.
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1968 MCI 5A with 8V71 and Allison MT644 transmission.  Western USA
will4104
Will 4104
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« Reply #8 on: July 03, 2013, 08:42:03 PM »



Good point Ed....    you think I should add a few more  Huh
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William Fenske
4104-716
Altamonte Springs, Fl.
Ed Hackenbruch
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« Reply #9 on: July 04, 2013, 06:21:58 AM »

Probably no need to add more, just keep the same setup as you already have.
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1968 MCI 5A with 8V71 and Allison MT644 transmission.  Western USA
RJ
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« Reply #10 on: July 04, 2013, 04:04:13 PM »

Good point Ed....    You think I should add a few more?

Will -

What you might consider is adding an additional stop lamp assembly in the panel below the rear window and above the engine tailgate.

Or get really creative with some electronic do-dads and make the top Michigan Markers (the center cluster of three) flash whenever you step on the brakes?

Anything to keep others from trying to drive up your exhaust!

FWIW & HTH. . .

 Wink
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RJ Long
PD4106-2784 No More
Fresno CA
will4104
Will 4104
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« Reply #11 on: July 04, 2013, 05:48:55 PM »

Something I didn't think of until after the installation, how the lights will hold up with the heat off the engine. They are plastic...
Anyone win experience with these ?
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William Fenske
4104-716
Altamonte Springs, Fl.
gus
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« Reply #12 on: July 04, 2013, 07:12:13 PM »

All my 4104 lights are the round plastic generic types, never any heat problem.
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PD4107-152
PD4104-1274
Ash Flat, AR
usbusin
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'60 PD4104-4355(sold) Now Freightliner Conversion




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« Reply #13 on: July 04, 2013, 09:35:38 PM »

Something I didn't think of until after the installation, how the lights will hold up with the heat off the engine. They are plastic...
Anyone win experience with these ?

I had "Truck-lite" units in my 4104.  No problem in 16 years.
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Gary D

USBUSIN was our 1960 PD4104 for 16 years Ustruckin' is our 2001 Freightliner truck conversion
belfert
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« Reply #14 on: July 05, 2013, 05:28:02 AM »

A lot of newer buses have high brake lights in addition to the ones at the normal level.  I suppose it gives them better visibility as hardly any of them will ever tow a trailer.  City buses locally have high mounted lights that are not red that flash when the bus is braking.  My bus is new enough to have a factory installed third brake light, but I replaced it with LED since the bulbs were hard to replace.

I almost always tow a trailer and have never thought about what happens if the trailer lights go out.  I have LED lights on the trailer so they shouldn't burn out, but what if the plugs comes out or something.  Nobody would ever see the bus brake lights.
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Brian Elfert - 1995 Dina Viaggio 1000 Series 60/B500 - 75% done but usable - Minneapolis, MN
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