Chuck,
I'll be darned if it still doesnt act like a ground problem, except that
open door stuff.
OK, lets try these things next,
First, if you have another bulb, try it. It weird but a couple of times
I've seen new bulb bad right out of the package.
Second, take the lens off the offending light, and take a temporary
ground wire and touch it to the ouside of the bulb socket while the
light is on. If no difference, try to touch it to the metal side of the
bulb itself while in the socket, there is usually a little bit that
sticks out of the socket.
Third, run a power jumper wire from the BATTERY and touch it to each
contact with the door open, see if both filaments will light.
I'll think about this and see if I come up with other possibilities.
chuck clark wrote:
>
> I wrote the other day that I had a problem with my tail lights on my 49
> panel. I put an additional rear light on the rear door (right side light) in
> order to have better brake lights and turn signals. I was having a problem
> with the new light (right side) not working properly, i.e. the light goes
> out completely when the lights are on and the brake is applied. The left
> light works ok when this happens. Also when the brake light is on, the new
> one is dimmer than the left side or original light.
>
> A couple of responses indicated I had a groung problem. I removed the buld
> socket bracket and put in a new set of contacts, ground all the paint off of
> the area on the bulb holder bracket where it touches the light housing and
> the similar area on the tail light housing. Put it back together and same
> thing happens. Also ran a seperate ground wire from the tail light
> attaching bolt to the body, by passing the door hinge as a grounding source,
> but no change. The wires go from the light switch and the brake switch back
> to the left side door body contacts and then a wire for each of the right
> side lights is pigtailed off of that switch.
> A couple more observations on the problem. Whether the brake is on or the
> tail light is on in the new light, the same filament is lit, the dimmer or
> smaller filament. This is the case even if I switch the wires. I am
> getting voltage (using a test light) through both contacts in the new tail
> light bulb socket with the brake light and the tail light on. When the bulb
> is in, it just goes blank when both lights are turned on. Also, I noticed
> that when the left side door contacts are not touching (the left side door
> is open) the right side light will not work at all when the door is held
> closed so the right side contacts are closed.
>
> Thank you for any additional insights you may have on this problem.
>
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John Dorsey
Wauchula FL
http://www.strato.net/~jrdorsey
'49 3800 Chevy Panel
'52 640 GMC Firetruck
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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