Why did my radio & power windows quit working at the same instant?

2002 LS dash lights out first & also. Gonna check the connections on switch. Ground diagram?

Check all fuses first, they are at the passenger side dash when you open the pass. door. Look at fuses in the engine compartment contained in the black box passenger side of engine also. I don't have the repair manual at hand to tell you preciously, but can if you can't find the obvious perhaps when looking first at fuses at the pass. side dash compartment...

Sorry to hear this. Because I'm not a technician, I'm unable to diagnose what's going on with your vehicle. I would suggest taking your vehicle into your GM dealership and having them diagnose it. If you would like for me to research your VIN, please PM me at socialmedia@gm.com Attn: Vanessa in the subject line. Vanessa GM Customer Service

So it rained last night, roads wet and dash lights came on this a.m. I am sure these are grounding issues, I have checked ALL fuses & breakers multiple times, and thank you guys for help so far... Where can I get a grounds diagram for my 2002 Buick regal ls? Thank you guys!!

Same problem with 2004 park ave. Was a defective 30amp breaker fuse in a small fuse block next to main fuse block under hood near battery

INADV POWER BUS This 15 amp fuse inside the interior fuse box end of dash board was the fuse that caused my 2000 Buick Century too loose the radio, dome light and all four windows would not operate. It burned when I raised two rear windows at the same time and the amp load was to much for the fuse. I used a test light only and checked each fuse by, ground to the dash frame then check each fuse in place by touching the tiny tab on the top of each fuse, must have power on both side's of the fuse with the ignition in the on position, engine not running.

Light and window keep blowing fuses

02 Buick window and radio keep blowing fuses

02 Buick windows and radio keep blowing fuses