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Headlights randomly turn on off and on

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Old 09-12-2017, 02:00 PM
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Default Headlights randomly turn on off and on
My headlights have started turning off and on randomly. At first it was only when the brights were on but last time I drove the dims started doing it too. dash and taill lights stay on and turn signals still work. any suggestions on were to start looking?

1990 f150 5.0 5spd 4wd
Last edited by Jeff Switter; 09-12-2017 at 02:21 PM.
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Old 09-12-2017, 02:11 PM
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Year? Engine? Model?
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Old 09-12-2017, 02:17 PM
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1990 f150 5.0 5spd
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Old 09-12-2017, 02:21 PM
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added info to post.
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Old 09-12-2017, 02:51 PM
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Having all the info may help you get the answer you need. Sorry that I cant provide you with the answer though.
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Old 09-13-2017, 09:31 AM
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Probably a bad headlight switch
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Old 09-13-2017, 01:17 PM
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I've seen that frequently, so far it has always been the dimmer switch.
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Old 09-18-2017, 03:35 PM
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Found the problem, the connector to the headlight switch was burnt. I replaced connector, switch and dimmer switch. seems to be working now.
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