"charge" light flicker issue

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Jun 21, 2014 | 09:38 AM

1981fordstepside

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From: Winnipeg

"charge" light flicker issue

I noticed today when driving after a few minutes the "Charge" idiot light flickers on and off randomly. Truck ran fine and starts fine. The light stops flickering when I put the head lights on. Am I correct in assuming there is an alternator issue maybe a voltage regulator and when I turn on the lights it draws enough power to keep the charge light from coming on?

Jun 21, 2014 | 12:06 PM

CountryBumkin

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From: Orlando area

It sounds like something is wrong. I would start by putting a volt meter on the battery (first with engine off) and seeing what the charge rate is a 1000 rpm with headlights off and on.

Jun 21, 2014 | 12:34 PM

Franklin2

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From: Virginia

Check the ground to the regulator case. I am assuming you are working on a 81?

Jun 21, 2014 | 12:43 PM

1981fordstepside

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From: Winnipeg

I don't have much experience with testing electrical systems.

With a voltage meter would I touch the ground and power to case from bat and read voltage? Should be between 12-14?

Jun 21, 2014 | 01:06 PM

JimsRebel

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Joined: Mar 2008

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From: Washington

I have one of these to trouble shoot issues like these. about $3 from Hong Kong

http://www.ebay.com/itm/Digital-LED-Auto-Car-Truck-Cigarette-Lighter-Volt-Voltage-Gauge-Meter-12V-24V-/360736213678?pt=Motors_Car_Truck_Parts_Accessories&hash=item53fd8dcaae&vxp=mtr