hey guys, i have a new issue. i was driving my truck today and heard this squealing noise, kinda like a belt. so i popped into neutral and revved the engine a couple times. the squealing stopped, but the check gauge light came on and the amp meter went to -18. i had the codes checked at the dealer and it threw a low voltage code. ive had the alternator checked and its good, but it had a lifetime warranty so i went ahead and got a new one just to be safe. any ideas as to what could be wrong THIS TIME? thanks in advance.

 

You might check/change the belt. It might be slipping over the alt pulley. Even if it is that should have made it pop a GEN light instead of the check engine. Also check grounds and for giggles, check the battery.

 

thanks. it didnt pop a check engine light, it popped the check gauge light. i havent put the new alt on yet. im hoping that solves the problem.

 

just installed the new alternator. i noticed when i took the old one off that the tensioner didnt feel exactly right, but when i put the new alt on i really noticed it. the tensioner is deff. bad. on another note. i picked up a new neutral safety switch today at the dealer. i put it on right after installing the alt. and my reverse lights STILL are not working!! ugh! there was not a cup washer on the dealer switch like there was with the part store brand. is this a big issue? do i need to take it back out and put the washer on? any and all help will be greatly appreciated.

 

Did you make sure that the reverse bulbs aren't burnt out?

 

yeah, they're brand new. they were replaced in june when my truck was painted. i just cant figure out what in the world is wrong here.