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Old 11-05-2008, 08:13 PM
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Headlights

I have a 69 nova, that is giving me headlight problems. I bought the car
a while back and the lights worked fine, but then one night I was driving it
and put the lights on bright and they went completely out, so I put them back
on dim and they work. Not knowing what was wrong I replaced the dimmer
switch. that did not work, so I replaced the headlight switch and that did not
work either. So I don't what to do.
Thanks Jeff

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Old 11-05-2008, 09:07 PM
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Get a tester and check at dimmer, sounds like the juice is not getting from the dimmer to the lights and only the hi-beam wire is a problem.. Check connections at the harness where both light feeds are connected together.
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Old 11-05-2008, 10:18 PM
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I agree you seem to have wiring problems. On a '69 Nova, the dim filaments should stay on when you turn on the brights.
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Old 11-05-2008, 10:46 PM
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I would start with checking the 'through' firewall connector, and the fuse block. It is not uncommon for bad connections there.

To help, here is the wiring schematics.
Attached Files
File Type: pdf 1969 Nova.pdf (180.3 KB, 51 views)
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Old 11-09-2008, 06:58 AM
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You're getting some good advice. Invest in a decent multimeter, get a wiring diagram and test before you replace! The diagram carsavvycook sent looks good. In the long run you'll save lots of time and money, not to mention impress your friends and relatives.....LOL. The only thing I would do is start at the headlights and work my way back. You could have 2 burned out high beams. A lot of times one headlight burns out and the driver doesn't notice anything wrong until the other one burns out too.
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Old 11-09-2008, 06:59 AM
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Check all your grounds..........
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Old 11-09-2008, 07:40 AM
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headlights

I agree check the grounds . The wires can be broken under the insulation and they look fine but they not. Grounds are often over look.
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Old 11-09-2008, 12:47 PM
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Once you get your high beam problems resolved (my guess would be either bulbs or ground wire), you might want to install one of the kits with relays that provide more direct power to your headlights.

You can install relays (high and low beam) in the engine compartment, powered directly off a fused, direct battery connection, and let the original headlight circuits just activate the relays. This reduces voltage loss a lot (very short wiring from battery to headlight), and has enough amperage to drive sealed beam halogen bulbs. It is a relatively cheap solution that will give you a big improvement in light.

Bruce
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Old 11-10-2008, 09:21 AM
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Quote:
Originally Posted by 75gmck25
Once you get your high beam problems resolved (my guess would be either bulbs or ground wire), you might want to install one of the kits with relays that provide more direct power to your headlights.

You can install relays (high and low beam) in the engine compartment, powered directly off a fused, direct battery connection, and let the original headlight circuits just activate the relays. This reduces voltage loss a lot (very short wiring from battery to headlight), and has enough amperage to drive sealed beam halogen bulbs. It is a relatively cheap solution that will give you a big improvement in light.

Bruce
Bruce, I am just adding this, because this is my favorite link for wiring the 'bosch' relay.

http://www.6066gmcguy.org/BoschRelay.htm
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Old 11-13-2008, 04:31 PM
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Thanks for the address to the Bosch relay! I'll use it with my hard wire applications in the future. Excellent info, user friendly!!
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Old 11-13-2008, 06:47 PM
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Quote:
Originally Posted by jimfulco
I agree you seem to have wiring problems. On a '69 Nova, the dim filaments should stay on when you turn on the brights.
Have to disagree here.
The dimmer will only supply power to one of the filements at a time.

"either--or" thing going on here

I believe the light green wire is the high beam
the tan wire to the low beams.

If your dimmer is getting power, and the hi beams are working----then the issue will be the tan wire between the dimmer and the headlights.
need to check if you have power at the tan wire at the switch.
then check the wiring to the bulkhead disconnect (unplug harness and find the wire connector)
Will need a wiring diagram to locate the wire position (sorry, I dont have one)

If this checks out---you will need to check continuity to the headlamps (again, the tan wire).

If the bulkhead does not pan out----issue with a broken wire in the fusebox assy.

Not much involved here---just gotta trace the wires out.
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Old 11-13-2008, 06:55 PM
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Quote:
Originally Posted by Bryan59EC
Have to disagree here.
The dimmer will only supply power to one of the filements at a time.

"either--or" thing going on here

I believe the light green wire is the high beam
the tan wire to the low beams.

If your dimmer is getting power, and the hi beams are working----then the issue will be the tan wire between the dimmer and the headlights.
need to check if you have power at the tan wire at the switch.
then check the wiring to the bulkhead disconnect (unplug harness and find the wire connector)
Will need a wiring diagram to locate the wire position (sorry, I dont have one)

If this checks out---you will need to check continuity to the headlamps (again, the tan wire).

If the bulkhead does not pan out----issue with a broken wire in the fusebox assy.

Not much involved here---just gotta trace the wires out.
I posted the wiring schematics on post #4 above.
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Old 11-17-2008, 10:10 PM
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Last time I checked, my '69 Nova worked the way I said, as does my '72. The light from the low-beam filament is visible whether the brights are on or off. The either-or stuff came along a few years later.
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