flickering head and dash lights

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Aug 17, 2018 | 10:30 PM

happy42316

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flickering head and dash lights

2004 chevy tahoe z71 4x4, my dash and headlights are flickering i have a new alternator and batt is just now a year old what could be the problem

Aug 19, 2018 | 08:13 AM

8.Lug

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Bad electrical connections for the alternator cause this.

Aug 28, 2018 | 09:46 PM

99 Black Bird T/A

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My 99 TA developed same issue. New alternator fixed flickering lights. Even the gauge cluster flickered. Probably a bad diode/ voltage regulator in my case.

Aug 28, 2018 | 11:12 PM

j498

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Quote:

Originally Posted by 99 Black Bird T/A

My 99 TA developed same issue. New alternator fixed flickering lights. Even the gauge cluster flickered. Probably a bad diode/ voltage regulator in my case.

I had this issue with an old Honda and the resolution was the same. I had a constant surging of power and increase in brightness from all lights that would increase then decrease every few seconds. Measuring my alternator output with a multi-meter showed it surging from 12v to 15V and back down again. Unplugging the alternator temporarily resolved the symptoms and confirmed that the unit was bad.

Aug 30, 2018 | 04:41 PM

qweedqwag

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Quote:

Originally Posted by 99 Black Bird T/A

My 99 TA developed same issue. New alternator fixed flickering lights. Even the gauge cluster flickered. Probably a bad diode/ voltage regulator in my case.

Same thing here, replaced the alt and problem was gone.

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