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06-02-2019, 10:07 AM | #21 |
Senior Member
Join Date: Dec 2017
Location: Guthrie, OK
Posts: 1,144
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Re: Lighting dims question
As Penthode correctly points out, there is resistance somewhere in the circuit path. If symptoms occur with either generator or battery-only power, the prime suspect is the grounding. Connect a wire to the (+) battery post and run it to the front. With headlights on, touch the other end to a headlight bucket. If the light brightens, the problem is somewhere between.
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06-02-2019, 10:56 PM | #22 |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Lighting dims question
"Turn on the lights, but as soon as I hit the brakes, lights dim considerably. Also, with lights on (no brake lights yet), horn just says 'eeeeer', although I have a great horn without the lights on."
Sure sounds like a short in the brake switch, wire, or brake light socket to me. What does the ammeter read when you step on the brake? |
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06-03-2019, 05:34 AM | #23 | |
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Join Date: May 2010
Location: Largo Florida
Posts: 7,225
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Re: Lighting dims question
Quote:
Yep, agreed. Others think the same. I'm wondering if we will ever know. |
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06-03-2019, 09:17 AM | #24 |
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Join Date: Apr 2018
Location: Mebane NC
Posts: 2,350
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Re: Lighting dims question
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06-03-2019, 07:15 PM | #25 | |
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Join Date: Oct 2016
Posts: 60
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Re: Lighting dims question
Quote:
It is the wiring. Think about Ohm's Law. It is the DC resistance from the battery to the junction at the head lamp switch. Did you read my detailed post? As was pointed out by Badpuppy, it could simply be a high resistance between the positive battery post and ground. If it was a brake switch short, the ammeter would peg and you would get a bad smell... |
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