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PostPosted: Sun Sep 22, 2019 11:22 am 
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2 BBL ''SuperSix''

Joined: Sat Sep 21, 2019 2:44 pm
Posts: 11
Car Model*: 1983 Dodge D150
So at night I noticed my headlights, taillights and dash lights pulsate steady independently of engine rpm. It’s constant weather I’m driving 60 mph or sitting at an idle. Checked both my grounds on the battery as well as the ground on my electric fuel pump. Replaced my alternator, it was weak anyways, with no improvement. And battery tests strong. Any ideas? Thanks guys.


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PostPosted: Sun Sep 22, 2019 2:46 pm 
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Board Sponsor & Contributor

Joined: Thu Oct 31, 2002 5:39 pm
Posts: 23776
Location: North America
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Faulty voltage regulation, either because of a failing regulator or an issue in the wiring between the ignition switch, the regulator, and the alternator.

Electric fuel pumps on carbureted vehicles are dangerous unless they're wired up thoughtfully. They're also usually unnecessary; why's this truck have one?

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PostPosted: Sun Sep 22, 2019 2:52 pm 
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2 BBL ''SuperSix''

Joined: Sat Sep 21, 2019 2:44 pm
Posts: 11
Car Model*: 1983 Dodge D150
Previous owner installed one after the mechanical one went out. I was thinking it would be the voltage regulator. Any idea where it’s located? And why are electric pumps dangerous with carburetor vehicles? Should I go back to the mechanical pump?


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PostPosted: Mon Sep 23, 2019 12:56 am 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 23776
Location: North America
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Supachet148 wrote:
Previous owner installed one after the mechanical one went out.


Correct fix would've been to replace the pump with another of the same type.

Quote:
I was thinking it would be the voltage regulator. Any idea where it’s located?


Firewall.

Quote:
And why are electric pumps dangerous with carburetor vehicles?


Read the link. On this board, red text within a message is clickable.

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PostPosted: Mon Sep 23, 2019 4:48 am 
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2 BBL ''SuperSix''

Joined: Sat Sep 21, 2019 2:44 pm
Posts: 11
Car Model*: 1983 Dodge D150
Thanks! I’ll let you know what I find.


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PostPosted: Mon Sep 23, 2019 9:02 am 
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Supercharged

Joined: Wed Sep 17, 2008 6:48 pm
Posts: 3118
Location: Indianapolis
Car Model*:
if it is not the VR, check into what this article recommends

https://www.hotrod.com/articles/mopp-08 ... eadlights/


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PostPosted: Thu Sep 26, 2019 5:25 pm 
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Supercharged

Joined: Wed Sep 17, 2008 6:48 pm
Posts: 3118
Location: Indianapolis
Car Model*:
and additional info on resolving flickering head lights,,,

https://www.forabodiesonly.com/mopar/th ... ts.406392/


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PostPosted: Fri Sep 27, 2019 3:54 am 
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2 BBL ''SuperSix''

Joined: Sat Sep 21, 2019 2:44 pm
Posts: 11
Car Model*: 1983 Dodge D150
Per your guys advice I got around to replacing that voltage regulator. Cleared it right up. Thanks again guys!


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