Electrical issues-67 Cuda Notch

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Raaf69

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Throwing this one out there for some help.
I have a 67 Cuda Notch, just cleaned the fuse block and installed all new fuses. I have headlights,taillights,brake lights, dome light and dash lights.
Flashers sometimes work at least 3 of them Drivers side front does not.
I have NO directionals. this is literally driving me crazy.
When the flashers are on, the left bulb in the dash and the drivers light do not work. Is that coincidence or something??
 
OK, let's define "flashers" Use a term we can know for certain, as you have SIGNALS and you have HAZARD or "4 way" flashers

So is it the turn signals or 4 way that do not work, or both?

First thing I'd do is go around, take all lenses off and clean the socket shells and bulb contacts, and the bulbs, or replace them.

Second is consider the flasher units. There are two, one for the hazards, and one for turn signals

Grounds is one of the no1 bigtime troubles. Make sure the sockets are grounded. Turn on the tail lights. Take a meter or test lamp and go to each socket. Ground one probe of the lamp / meter and make CERTAIN the lamp is grounded, then stab the other probe directly onto the socket shell. Any lamp indication or voltage shows the socket is not grounded.

Also, "these" troubles can be right in the bulbs. Make CERTAIN they are the correct bulbs. Bulbs can develop shorts internally that crosses the filaments together, which causes some interesting results.
 
OK, let's define "flashers" Use a term we can know for certain, as you have SIGNALS and you have HAZARD or "4 way" flashers

So is it the turn signals or 4 way that do not work, or both?

First thing I'd do is go around, take all lenses off and clean the socket shells and bulb contacts, and the bulbs, or replace them.

Second is consider the flasher units. There are two, one for the hazards, and one for turn signals

Grounds is one of the no1 bigtime troubles. Make sure the sockets are grounded. Turn on the tail lights. Take a meter or test lamp and go to each socket. Ground one probe of the lamp / meter and make CERTAIN the lamp is grounded, then stab the other probe directly onto the socket shell. Any lamp indication or voltage shows the socket is not grounded.

Also, "these" troubles can be right in the bulbs. Make CERTAIN they are the correct bulbs. Bulbs can develop shorts internally that crosses the filaments together, which causes some interesting results.

Sorry, The Hazards all work except for the Driver front and all the turn signals front and back-do not work.
I am going to replace all the bulbs this evening and clean all the sockets and try to test that way and see if I get any results.
 
I would work on hazards first. That way you know all the sockets and lamps work.

Next, be sure the brake lamps work and work RIGHT. WHY?

Because the brake lights are routed through the signal switch, so here's what you do

Start with parking lamps OFF You need two people or a mirror

See if both brake lights come on nice and bright.

Next, WHILE you are holding down the brake pedal, switch on the park lights. If the sockets are ungrounded (either one) one or both the stop lamps will go dim or go out.

Fix that if necessary

Next, turn the signal switch first left, then right, while holding down the brake pedal. One lamp should go out, the other stay on.

Last, turn signals.......you might have a bad flasher unit. As I said, there are two flashers.
 
I would work on hazards first. That way you know all the sockets and lamps work.

Next, be sure the brake lamps work and work RIGHT. WHY?

Because the brake lights are routed through the signal switch, so here's what you do

Start with parking lamps OFF You need two people or a mirror

See if both brake lights come on nice and bright.

Next, WHILE you are holding down the brake pedal, switch on the park lights. If the sockets are ungrounded (either one) one or both the stop lamps will go dim or go out.

Fix that if necessary

Next, turn the signal switch first left, then right, while holding down the brake pedal. One lamp should go out, the other stay on.

Last, turn signals.......you might have a bad flasher unit. As I said, there are two flashers.


Will try that tonight and update!!! Thanks.
 
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