Headlights

Thanks everyone. I will check connections and diodes. I am going to consider the upgrade. One thing that I wondered about was the fact that I just installed a stereo a day or two before. But I used the same connections that the radio used. I dont think the two are related. Famous last words.

I have a question now that you mention installing a stereo. Is it a stereo system with amplifier and sub woofers or did you just switch out the radio (now called head unit) for a upgraded version? If you have installed a amp for either the drive speakers or added a amp to power sub woofers then it is going to be related. But if you just switched out the head unit and have not added any amplifier then used the same wires for power and speakers then it should not cause your headlights to dim.