[miatapasta]

Well guys as some of you may know I had an ECU problem lately. I just got done replacing it and fired right up with the help of some starter fluid being sprayed into the intake. Anyways, so I go to turn the lights on and I hear this really loud squeal, something that didn't happen before the replacement ECU. I think I have it located somewhere near the alternator but with me being just a humble shade tree mechanic with his first car I could be wrong. It's a 1990 by the way. What do you guys think?

 

[miatapasta]

Nevermind guys, turns out it's the belts squealing and it's time to do the water pump and timing belt changes anyways.

 

[jdmae92]

When you turn on the lights it puts more load on the alternator and can aggravate already worn belts so they squeal.