You aren't mixing 6V and 12V bulbs are you?
First, the lights should be connected in parallel, not in series.
I am assuming they are.
Second, there should be the same voltage to each bulb. If not, you
have a problem with the supply wiring.
Third, they need a good ground directly to the frame. The box side
and the grille may or may not be a good ground.
Start by taking a voltage reading at the light when it is doing these
things. You should have battery voltage when they are on.
Second, double check your wiring. If you have dual filament bulbs,
the dimmer one should be the tail lights.
Third, get some jumper cables from Radio Shack (aligator clip on
each end) and ground the lamp housing directly to the frame and see
if things don't improve.
One of these should make the lights work.
Bruce K
57 3200
Mt. Iron, MN
At Wednesday, 04 December 2002, you wrote:
>I'm having problems with installing another tail light on my 49
panel. I
>ran wires from the original taillight (left) on the drivers side
over to a
>duplicate light on the passenger side (right). Depending on how
the two
>wires on the right are connected to the left, the left brake light
will be
>bright and the right real dim. With the tail and brake light connected,
when
>the brake is on the right tail will go dark completely and the left
brake
>will be bright.
>
>Do I have a ground problem and if so how do I correct. The grounding
for
>both lights is through the connection of the light to the rear doors
(the
>same principal as for the parking lights up front grounded through the
>connection of the light housing to the grill.). I also noticed that
the
>right parking light (passenger side) is dim while the drivers side is
>bright.
>
>Stumped
>
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