headlight conversion bronc graveyard
Fleet Mechanic
Joined: Sep 2009
Posts: 1,572
Likes: 37
From: Northern Virginia.
when I used that harness, I had to remove the crud surface
rust and some paint to get a better ground.
my harness has both high and low on when high beams are
on. I got sealed Sylvania bulbs. the harness was a good
difference compared to original harness.
no issues.
rust and some paint to get a better ground.
my harness has both high and low on when high beams are
on. I got sealed Sylvania bulbs. the harness was a good
difference compared to original harness.
no issues.
Thread Starter
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Fleet Mechanic
Joined: Jul 2017
Posts: 1,276
Likes: 12
From: KY
The high-beam indicator lamp is powered by the right headlamp circuit. As another test, try disconnecting only one or the other headlight.
So disconnect the driver's side lamp and turn on the high-beams. Then re-connect it and do the same test with the passenger side. See if it makes any difference either way.
Paul
So disconnect the driver's side lamp and turn on the high-beams. Then re-connect it and do the same test with the passenger side. See if it makes any difference either way.
Paul
Might as well check battery voltage while you're at all this testing. Off and running both. Should be approx. 12 to 13 volts, depending on how long before that the engine had been running. If it's been sitting awhile since last charged, 12.3 to 12.6 volts. When running you should see 14.5v approx. even with all the accessories running amuck.
Not sure that the relay harness enhances safety, per sé. But it makes sure that the lights are getting full system voltage rather than a somewhat lesser value.
If the rest of your wiring is in great shape, your lights should still work fine without them.
I installed relays in both my Bronco and F350 probably 30 years ago now. Neither had anything like what you're experiencing.
Paul
Not sure that the relay harness enhances safety, per sé. But it makes sure that the lights are getting full system voltage rather than a somewhat lesser value.
If the rest of your wiring is in great shape, your lights should still work fine without them.
I installed relays in both my Bronco and F350 probably 30 years ago now. Neither had anything like what you're experiencing.
Paul
Yeah mine is fresh paint but have cleaned the grounds for harness an use star washers , but do plan on removing it to inspect , as it sounds like a ground issue to me as well
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whiteisright
1973 - 1979 F-100 & Larger F-Series Trucks
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Oct 25, 2011 11:26 PM
