99 Blazer Interior lights/headlights flicker when running. hmm?

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Apr 30, 2010 | 09:18 PM

Nizm0

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Joined: Apr 2010

Posts: 5

99 Blazer Interior lights/headlights flicker when running. hmm?

Just did an engine swap in the 99 Blazer, now the headlights/interior lights flicker, any ideas? Runs good otherwise.

Apr 30, 2010 | 09:32 PM

swartlkk

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Joined: May 2005

Posts: 41,333

From: Waterloo, NY

Test for AC voltage getting past the diodes on the alternator. You shouldn't see more than 50mV-AC when measuring positive to negative on the battery with your multimeter set to the V-AC or mV-AC scale.

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