crushhour2086
Junior Member
im not sure if this is the right area to ask this but I have a 2010 Dodge Ram 1500 with 4.7L engine. just last weekend I was driving with the AC on and I came to a light and when the aux fan kicked in, I saw the volt meter drop down halfway. Then it slowly recovered, so I went on a drive later and it did the same thing so I hooked up a mutimeter and watched it. It charges at 14.4 with lights and AC running but when the aux fan kicks in it drops to battery voltage and then recovers after a couple of seconds and I can tell the engine bogs down a bit until the alternator recovers but nothing serious.Never seen it do this before and I believe it should be able to handle that no problem without dipping like that. Battery is about 2-3 years old and after a week of sitting it was at 12.36v before I ran my test. Also no corrosion on any connectors or loose wires. Im pretty sure the alternator is going and wanted to ask your opinion.