headlight

1962 CHEVROLET BEL AIR
52,000 MILES • 5.6L • V8 • 2WD • AUTOMATIC
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CHUCK KIRINOVIC
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  • 1 POST
my high beam goes on and off low beam works fine.
I installed a new high low beam switch and new headlight dash switch and the problem is still there. I know GM had a problem with those switches those years. I also checked the ground and it is clean and good.
I was told to install a by pass resister will that solve the problem and what size?
Thank you in advance.
Chuck
Sep 19, 2017 at 5:21 PM
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CJ MEDEVAC
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  • 11,004 POSTS
Okay, look over my link, at my answers, 'specially the picture of the connector.

https://www.2carpros.com/questions/1983-oldsmobile-delta-88-recently-headlights-start-flashing-their-own-charge

Also, check the light switch connector for "been hot" (loose/ floppy/ burnt terminals), and for "pushed back" terminals in it too.

Return here with good news!

The Medic



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Sep 19, 2017 at 6:27 PM
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STEVE W.
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  • 15,113 POSTS
The "normal" reason they flash is thermal overload on the switch. The common reason for that is higher resistance from either a failed bulb, or one of the bulb grounds fails and you get the same basic result.

Easy testing, connect a spare high beam lamp up to a couple test wires. Connect one wire to battery positive. Unplug each low beam. Now connect the "test light" to the ground terminal in each of the bulb sockets (black wire) If the grounds are good the bulb should light up real bright. (Each side has its own ground)

Another test, use a welding lens to look inside the bulbs with the high beams on. You should see only one filament lit in the low beams.

Also, check the light green wire (high beam power) for any damage or bad connections.

The issue should be between the dimmer switch and the lights.
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Sep 19, 2017 at 11:58 PM
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