Author Topic: Wierd Tail-light problem  (Read 3154 times)

Offline Trunkhill1

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  • Posts: 60
  • camper owner/repairman
  • Member since: 2015
  • I own: a travel trailer
  • Year: 1975
  • Make: Winnebago
  • Model: 166 Canadian
Wierd Tail-light problem
« on: July 20, 2015, 12:05 PM »
I've rewired the DC connection to the truck with a modern 6-wire plug.  The driver side brake/turn and plate light work as they should.  The passenger side (also a double filament) however will not illuminate the brake when the lights are turned on.  The turn signal flashes at a slightly slower rate than the drivers-side.  I checked out my truck and found my blinkers were functioning normally.  Is there some kind of relay I don't know about?  I checked all over and under the trailer.

Offline JessEm

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  • Posts: 212
  • I own: a Motor Home
  • Year: 1976
  • Make: Winnebago
  • Model: Chieftain D23C
  • Chassis: Dodge
  • Engine: 440
Re: Wierd Tail-light problem
« Reply #1 on: July 20, 2015, 01:13 PM »
Hi Trunkhill1, Most vehicles have a 'turn signal flasher', usually located in the fuse box. They wear out. I might start there... but maybe someone else has a better idea...



For lack of ANY better explanations, you may need to pull the actual fuse box and look at its connections on the back side... I had the running lights wire arc together with another always-hot wire, and it created all kinds of weird stuff on that circuit. And nobody had been back there since it left the factory.

EDIT: I just realized yours is a travel trailer... I have a motorhome so I'm not really sure if any of this applies.

Offline legomybago

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  • Posts: 1178
  • Member since: 2013
  • I own: a Motor Home
  • Year: 1974
  • Make: FMC
  • Model: 2900R
  • Chassis: FMC
  • Engine: 440
Re: Wierd Tail-light problem
« Reply #2 on: July 20, 2015, 01:48 PM »
Check and make sure your passenger side trailer light filaments are correctly wired. If switched around, or a bulb got shoved in backwards, you won't see any change in brightness due to the bright filament already is lit. Check your grounds.
Never get crap happy with a slap happy pappy

Offline JessEm

  • *
  • Posts: 212
  • I own: a Motor Home
  • Year: 1976
  • Make: Winnebago
  • Model: Chieftain D23C
  • Chassis: Dodge
  • Engine: 440
Re: Wierd Tail-light problem
« Reply #3 on: July 20, 2015, 01:57 PM »
I'll second the ground. I was AMAZED when I learned how much... weirdness... can be attributed to a poor ground.

Offline Rickf1985

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  • Posts: 5540
  • Member since: 2013
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: Chevy
  • Engine: 454
Re: Wierd Tail-light problem
« Reply #4 on: July 20, 2015, 06:07 PM »
Definitely sounds like a bad ground at the light.

Offline Froggy1936

  • 13 year member
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  • Posts: 1550
  • Member since: 2004
  • I own: a Motor Home
  • Year: 1977
  • Make: Winnebago
  • Model: Minnie Winnie
  • Chassis: Chevy G30
  • Engine: 5.7 1995
Re: Wierd Tail-light problem
« Reply #5 on: July 20, 2015, 09:54 PM »
Another very hard thing to find is a bad bulb, That a filament has broken and fallen down to the other circuit . This will drive ya nuts . Best cure replace both dual filament bulbs with new ones Frank
The Journey is the REWARD !

Offline Trunkhill1

  • *
  • Posts: 60
  • camper owner/repairman
  • Member since: 2015
  • I own: a travel trailer
  • Year: 1975
  • Make: Winnebago
  • Model: 166 Canadian
Re: Wierd Tail-light problem
« Reply #6 on: August 06, 2015, 11:30 PM »
So after playing with the wiring and wanting to leave it exposed anyway, I gave up trying to fix the OEM assemblies and put in new ones.  They began working as advertised.

 

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