1990 Chevrolet 1500 Pickup Q&A
1990 Chevrolet 1500 Pickup Question: What would cause random voltage spikes to around 17 volts?
I am getting about a 17v voltage spike during the first 10-15 minutes after start up. They will hold for a few minutes then drop, and return again. After the engine warms up, they seem to go away. Any thoughts as to the cause? - Visitor
alternator. repair it before it damages your computer Roy - mastertech6371
take your alt in to a auto parts store to be checked if its good then it could be your voltage regulator - pm69