Blinking headlights
Thread Starter
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Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
Blinking headlights
Anyone have problems with blinking headlights?
I had a burned up headlamp connector last summer. No marker lights because the wire was burned up. I was able to get a new connector from Autozone, and I replaced the switch too.
Now I've replaced the headlamp switch twice, picking two different brands because the headlamps will blink once in a while on high beam. Anyone run into this? I'm assuming it's the circuit breaker built into the switch cycling once in a while.
I've looked over the wiring harness, and I don't see an obvious short. Do headlamps bulbs sometimes draw too much current?
I had a burned up headlamp connector last summer. No marker lights because the wire was burned up. I was able to get a new connector from Autozone, and I replaced the switch too.
Now I've replaced the headlamp switch twice, picking two different brands because the headlamps will blink once in a while on high beam. Anyone run into this? I'm assuming it's the circuit breaker built into the switch cycling once in a while.
I've looked over the wiring harness, and I don't see an obvious short. Do headlamps bulbs sometimes draw too much current?
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Anyone have problems with blinking headlights?
I had a burned up headlamp connector last summer. No marker lights because the wire was burned up. I was able to get a new connector from Autozone, and I replaced the switch too.
Now I've replaced the headlamp switch twice, picking two different brands because the headlamps will blink once in a while on high beam. Anyone run into this? I'm assuming it's the circuit breaker built into the switch cycling once in a while.
I've looked over the wiring harness, and I don't see an obvious short. Do headlamps bulbs sometimes draw too much current?
I had a burned up headlamp connector last summer. No marker lights because the wire was burned up. I was able to get a new connector from Autozone, and I replaced the switch too.
Now I've replaced the headlamp switch twice, picking two different brands because the headlamps will blink once in a while on high beam. Anyone run into this? I'm assuming it's the circuit breaker built into the switch cycling once in a while.
I've looked over the wiring harness, and I don't see an obvious short. Do headlamps bulbs sometimes draw too much current?
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 103
From: Ashland City, TN
https://www.ford-trucks.com/article/...r_Brights.html
This is a pretty old article. (I didn't check the link)
But it is about the ford wiring on our trucks and how to redo it better.
This wont help your problem, but you were asking about the draw.
Perhaps this will give you a few more ideas of places to check.
This is a pretty old article. (I didn't check the link)
But it is about the ford wiring on our trucks and how to redo it better.
This wont help your problem, but you were asking about the draw.
Perhaps this will give you a few more ideas of places to check.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
https://www.ford-trucks.com/article/...r_Brights.html
This is a pretty old article. (I didn't check the link)
But it is about the ford wiring on our trucks and how to redo it better.
This wont help your problem, but you were asking about the draw.
Perhaps this will give you a few more ideas of places to check.
This is a pretty old article. (I didn't check the link)
But it is about the ford wiring on our trucks and how to redo it better.
This wont help your problem, but you were asking about the draw.
Perhaps this will give you a few more ideas of places to check.
Thats a very good article. Reps sent.
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Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
?? How would that relate?
Markers stay on, but the headlights go all the way out and come back on about 2 - 3 seconds apart.
Markers stay on, but the headlights go all the way out and come back on about 2 - 3 seconds apart.
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Thread Starter
|
Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
https://www.ford-trucks.com/article/...r_Brights.html
This is a pretty old article. (I didn't check the link)
But it is about the ford wiring on our trucks and how to redo it better.
This wont help your problem, but you were asking about the draw.
Perhaps this will give you a few more ideas of places to check.
This is a pretty old article. (I didn't check the link)
But it is about the ford wiring on our trucks and how to redo it better.
This wont help your problem, but you were asking about the draw.
Perhaps this will give you a few more ideas of places to check.
Backwards wire the lights! Feed constant 12V to the common terminal of each light. Then a relay for high and low beam grounds one of the terminals. This way, each headlight can get it's own fuse. If there is a short, one light still works on both high and low beam.
FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
ohh, if the markers lights stay on, is not related with the alternator.
Thread Starter
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Fleet Mechanic
Joined: Aug 2007
Posts: 1,508
Likes: 2
From: The boonies by Dallas OR
I've replaced the bulbs, 3 headlamp switches and gone over the wiring.
A few months after I replace the switch, the blinking starts and keeps getting worse on high beam. Never a problem on low beam.
I'm guessing that the newer switches are just crap and so I've now put a pair of relays in. I wired them Japanese style, with +12V fed to the common terminal. Each bulb has it's own fuse. The high beam or low beam relay grounds the high or low beam filament connection. MUCH better know.
FYI, I did find a bit of weird Ford wiring. The ground wire for the bulbs is a 20 gauge wire, and the ground wire runs in the harness in front of the radiator and back before grounding. I'd guess this was to limit the voltage to the bulb for some reason.
A few months after I replace the switch, the blinking starts and keeps getting worse on high beam. Never a problem on low beam.
I'm guessing that the newer switches are just crap and so I've now put a pair of relays in. I wired them Japanese style, with +12V fed to the common terminal. Each bulb has it's own fuse. The high beam or low beam relay grounds the high or low beam filament connection. MUCH better know.
FYI, I did find a bit of weird Ford wiring. The ground wire for the bulbs is a 20 gauge wire, and the ground wire runs in the harness in front of the radiator and back before grounding. I'd guess this was to limit the voltage to the bulb for some reason.
Lead Driver
Joined: Aug 2006
Posts: 5,259
Likes: 17
From: Gambrills
I had a problem like this with an old tow truck 7.3 idi I use to drive. b/c there were so many add on after factory lights the lights would flicker. The switches went bad alot, several times a year. Just before I left they said they gave me a ambulance type switch. I worked there for a few more months w/o a problem. I don't know if it fixed it or not but it seemed to last longer than the standard switch. Just my 2 dinars
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