Crazy wiring problem

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hondaracer44

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Alright guys this has me scratching my head. I have a 90 gmc 350 tbi and when I take sharp right hand turns my voltage drops down to 11-12 volts. If anyone has any ideas I really appreciate it!
 

aaronb

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First thing I'd check would the battery terminals. Make sure they are tight and clean.
 

sntrym

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After the battery terminals, check the ground to the block/manifold wire and the wires to the alternator and fuse block.
 

streetperf

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What is the output of the Alternator at the rpm that you are turning the corner? It could be the alternator isn't producing many amps at that RPM. Also in a turn, the P/S is loading the engine thus slowing the engine down, and reducing voltage. You wouldn't be running the heater when making this turn? That would also take amps.
Just a thought. My crystal ball gets dim on some occasions.
 
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