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On Sun, 23 Apr 2006 20:53:10 -0400, jaminn
<jaminn@remove.this.jaminn.org> wrote:[color=blue]
>On Sun, 23 Apr 2006 23:07:19 GMT, Bruce L. Bergman
><blPYTHONbergman@earthlink.invalid> wrote:[/color]
[color=blue][color=green]
>> Check the grounds on the trailer tail light assemblies to the steel
>>trailer chassis, and the ground wire from the trailer tongue steel,
>>through the trailer connector to the truck body is continuous and
>>solid - make sure there's a good ground path the whole way.
>>
>> When there is a bad ground on a dual-filament lamp, you apply power
>>to the stop lights and it can't go to ground, so it goes through the
>>tail filament, to the other lamps, and finds it's way to ground.
>>
>> If the whole trailer isn't grounded right the same thing happens,
>>but it's not isolated to one fixture - all the lights act screwy.[/color]
>
>The grounds are connected to the steel chassis, but it is rusty. I'll
>clean all that up and see if it helps. Could be part or all of the
>problem.[/color]

The chassis can be rusty, as long as it's clean where the grounds
attach. While you're at it, go get a 2-ounce squeeze tube or the
half-pint can of Dielectric Lamp Base Grease - the one I use is
Truck-Lite "NYK-77 Corrosion Preventative Compound", any good auto
parts will carry it or can order it in for you quickly. Vaseline will
work, but this stuff works better.

[url]http://www.truck-lite.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10001&storeId=10001&productId=23656&langId=-1[/url]

UNPLUG THE POWER to the trailer lights. Take a plumber's 1/2"
Copper Pipe fitting brush and clean up all the bulb bases and the
trailer taillight lamp sockets and grease them.

They use Aluminum stampings for the Ground connectors in the lights,
and they often get cruddy where the lamp base lugs hit the grounded
lamp holder ring, or where the mounting screws get their ground from
the body skin.

And if part of the problem turns out to be the trailer connector
they make a special little cleaner brush for them, and you can use a
dab of NYK-77 on the pins.

--<< Bruce >>--

--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
Spamtrapped address: Remove the python and the invalid, and use a net.