Light issue

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Dec 21, 2014 | 08:47 AM

asc0205

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Light issue

Hi all, here's the problem. When my truck is running and the lights are on, they all pulse. Dash lights, headlights, parking lights, radio light, everything. I can't tell what exactly the issue is. I'm thinking maybe it is the voltage regulator or the whole alternator is going?

Dec 21, 2014 | 09:23 AM

bertha66

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From: Central Oregon

Welcome to the site.
Voltage regulator would be my first thought; you can pull the alt. and have it tested.

Dec 21, 2014 | 10:30 AM

asc0205

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Thanks! Will I be able to pick up irregularities in the voltage by testing with a voltmeter?

Dec 21, 2014 | 10:41 AM

bertha66

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From: Central Oregon

You may be able to,

Dec 23, 2014 | 07:20 AM

asc0205

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One more question if I may, would it be possible to remove the stock VR and upgrade the alternator to a more modern one with an internal VR? If so, is that recommended?

Dec 23, 2014 | 07:31 AM

fordguy62

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Check the stickied threads or Search "3g upgrade" idk if that's what your talking about but it definitely is am alternator upgrade

Dec 23, 2014 | 09:52 AM

co425

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The pulsing in your headlights is often caused by abismaly small wiring in your headlight circuit, and the internal breaker in your headlight switch. A common work around fix is to wire up a relay system for your headlights, and replace your headlight switch. This would be a fantastic time to find all of your grounds in your lighting circuit, clean the contact areas and go back together with some dielectric grease.