when my headlights are on bright, the lights all around will flicker on and off then may stay off unless I step on the dimmer again at which point all lights return to normal function.
I replaced the dimmer switch and it still happened!
Where would I begin to track down the problem?
Thanks a bunch!
Steve
Dimmer Switch
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72bumbee
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Dimmer Switch
“To succeed in life, you need two things: ignorance and confidence.”
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1972 F-250 Camper Special. 360 A/T P/B AND a DANA 60 Rearend!
Former owner of dads 1967 F-100. It has gone home to the big road in the sky...
Mark Twain
1972 F-250 Camper Special. 360 A/T P/B AND a DANA 60 Rearend!
Former owner of dads 1967 F-100. It has gone home to the big road in the sky...
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flyboy2610
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Re: Dimmer Switch
Sounds like a bad ground in the dimmer switch wiring to me.
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If you're going to live like there's no hell...............
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Red Green
If you're going to live like there's no hell...............
you'd better be right.
http://theworldasiseeit-flyboy2610.blog ... ee-it.html
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Busboy
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Re: Dimmer Switch
Sounds to me like flyboy doesn't know anything about electrical circuits. The dimmer switch circuits don't have any grounds at all. One wire comes from the headlight switch to the dimmer switch, the other two wires are for the low beams and high beams respectively. It doesn't help people with their problems to offer advice when you really don't know what your talking about.1967 F-100 4x4 custom cab.
Another 67 F-100 4x4 custom cab.
2016 F-150 Eco-Boost 2.7 liter. (It will smoke the tires!)
1972 F-350 Sport Custom cab & chassis.
1972 F-250 Explorer Special, Camper Special.
1971 F-100 custom. 302, C-4, p.s. p.b. factory 65 amp alternator with transistorized voltage regulator.
Another 67 F-100 4x4 custom cab.
2016 F-150 Eco-Boost 2.7 liter. (It will smoke the tires!)
1972 F-350 Sport Custom cab & chassis.
1972 F-250 Explorer Special, Camper Special.
1971 F-100 custom. 302, C-4, p.s. p.b. factory 65 amp alternator with transistorized voltage regulator.
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Ranchero50
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Re: Dimmer Switch
That's not very nice...Busboy wrote:
To the OP, I'd suspect something drawing too much current when the high beams are on and the headlamp switch or something upstream not being up to the task.
'70 F-350 CS Cummins 6BT 10klb truck 64k mile Bahama Blue
Contact me for CNC Dome Lamp Bezels and Ash Tray pulls.
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Busboy
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Re: Dimmer Switch
Maybe not but you know that I'm absolutely right.
1967 F-100 4x4 custom cab.
Another 67 F-100 4x4 custom cab.
2016 F-150 Eco-Boost 2.7 liter. (It will smoke the tires!)
1972 F-350 Sport Custom cab & chassis.
1972 F-250 Explorer Special, Camper Special.
1971 F-100 custom. 302, C-4, p.s. p.b. factory 65 amp alternator with transistorized voltage regulator.
Another 67 F-100 4x4 custom cab.
2016 F-150 Eco-Boost 2.7 liter. (It will smoke the tires!)
1972 F-350 Sport Custom cab & chassis.
1972 F-250 Explorer Special, Camper Special.
1971 F-100 custom. 302, C-4, p.s. p.b. factory 65 amp alternator with transistorized voltage regulator.
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eggman918
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Re: Dimmer Switch
Any bad/loose connection hot or ground will cause the circuit to pull more amps than it otherwise would, an IR thermometer should show a loose/hot connection the headlight wiring looms on trucks our age are also often not up to the task any longer, the wire or connectors can deteriorate over the years and the thermometer can again tell you whats going on under the insulation.... 
Steve
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
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There are only three types of people wolves, sheepdogs, and sheep. What are you?
The"Filthy Beast"- '68 F-250 Crew Cab 131"W/B 4x4 4BT compounds hx30/Wh1c,5x.012" sac injectors/ZF 5/NP203-205 /3.54 44 trutrack front/60 trutrack rear on 33's. 2nd owner
"Beauty is only skin deep....Ugly is to the bone"
It is more important to understand what you don't know than what you do know,because then you can start to learn..???
"you must deal with the attaboys and the ass chewing s with your head up and looking them in the eyes" T.J.E. aka My Dad
There are only three types of people wolves, sheepdogs, and sheep. What are you?
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phantomtruck68
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Re: Dimmer Switch
It's your headlight switch. They have a thermal breaker inside that will trip when to many amps are drawn through it. Have you changed headlights to halogens or added more markers, tail/brake lights to your truck. That is usually the reason of drawing to many amps. There is a person hear on this sight that makes a headlight re-wiring harness that adds relays for the high and low beams. That will drop amp draw on switch. I know from experience.
Joe
My Phantom truck
1968 F250 4x4
390 FE, bored .030, Crane 272 cam, 600cfm Edelbrock carb.
My Phantom truck
1968 F250 4x4
390 FE, bored .030, Crane 272 cam, 600cfm Edelbrock carb.
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72bumbee
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Re: Dimmer Switch
I will replace the light switch next, as that seems the easiest.
What concerns me is the fact that they will flicker on bright... It seems I tried jiggling the light switch to see if that would make them flicker. I also tapped the dimmer connector to see if that would make it flicker. No luck ..
I'll look around for a new harness in the meantime.
Thanks for the great input!
Steve
What concerns me is the fact that they will flicker on bright... It seems I tried jiggling the light switch to see if that would make them flicker. I also tapped the dimmer connector to see if that would make it flicker. No luck ..
I'll look around for a new harness in the meantime.
Thanks for the great input!
Steve
“To succeed in life, you need two things: ignorance and confidence.”
Mark Twain
1972 F-250 Camper Special. 360 A/T P/B AND a DANA 60 Rearend!
Former owner of dads 1967 F-100. It has gone home to the big road in the sky...
Mark Twain
1972 F-250 Camper Special. 360 A/T P/B AND a DANA 60 Rearend!
Former owner of dads 1967 F-100. It has gone home to the big road in the sky...
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cep62
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Re: Dimmer Switch
They usually only blink on high beam because high beams draw more amps, but my old snowplow truck will even blink on low beam after an hour or so.72bumbee wrote:What concerns me is the fact that they will flicker on bright... It seems I tried jiggling the light switch to see if that would make them flicker. I also tapped the dimmer connector to see if that would make it flicker. No luck ..
The relay setup will cure this (but I'm just tryin to get through this winter) (hopefully a "new" old truck next year )