I have a 2006 Suzuki XL7. Recently my alternator stopped working. It wouldn’t keep the car running when we jump started it. We replaced it with a new alternator and now its having the same issues that it did when the last alternator was working and eventually went bad. Here is everything I know, I’m hoping someone can help me solve this problem or tell me what is possibly wrong.
The car held at around 14.6 volts when we first started the car after putting in the new alternator. We turned on the radio, wind shield wipers, and the headlights. The voltage dropped to about 13.4. At this point we decided to drive it. We put the car in drive and only after I gave it gas it started squealing like the old alternator did before it died 3 or 4 weeks later. The car squeals at at a consistent rhythm. Until you give it more gas and it blurs and sounds like one constant squeal. The squealing is far louder when you are actively pressing on the gas. After taking it around the block a few times we tested the voltage once more and it was holding at constant 12.6 after everything in the car was turned off.
I think this is all the relevant information, but here is some brief history just in case it helps.
I had subs in the car, but they were disconnected when the new alternator was put in.
I installed an after market radio. The squealing did not start until long after this.
The battery is fairly new and the squealing with the first alternator was happening before we put the new battery in.
We replaced a broken pulley once, I’m not sure about the timeline on this, but it was before the squealing started.
I had an oil change just before the first alternator broke.
I still have the old alternator if that can tell me anything.
Thanks for any input you can give me, I appreciate anyone who made it even this far!