I got a blazer not too long ago, and I installed an aftermarket radio as soon as i got the blazer. The tweeters in the dash work, and the speakers in the front door work, but the rear speakers don't. I didn't check them before i replaced the radio, so I'm not sure if it's the radio or the speakers.
I was told this is a common problem, but wasn't told what the problem was.
So I checked this forum but didn't see anyone mention it.
So I'm just wondering if anyone knows what the problem is.

 

one day, my both rear speakers just went. i had an aftermarket in for 3 years...one day they both just went. checked the connection in back of the headunit it was fine. inspected the speakers, notice what crap they were, replaced them and never looked back. if theyre the OEM, trust me, theyre worth replacing.

if you put new ones in and still no sound, make sure all speaker wire connections are good

 

I finally ordered new speakers, and they all work great.
This is what I took out.



So now I understand why they didn't work.

 

Rear Speakers Not Working ? POSSIBLE SOLUTION:There is an "Audio Relay" in the Rear Speaker Circuit" I also have no sound in rear speakers. I have a 1995 4dr with "Six speaker system" While researching this problem I discovered that there is in fact a "Rear Speaker Relay", Pure accident there, But I'll take it! NAPA Auto Parts shows the part, PART#

Stereo Speaker Amplifier Relay Part Number: MPE AR606SB
So now where the hell is it located ??? I'm still on this one ! If anyone knows please share it with us "Rear Speaker Problem" People. also: additional part

Stereo Speaker Relay Connector Part Number: ECH EC1097
Product Line: Echlin Ignition Parts

 

Stereo Speaker Amplifier Relay Part Number: MPE AR606SB Why?

Stereo Speaker Relay Connector Part Number: ECH EC1097
Product Line: Echlin Ignition Parts

 

The factory rear speakers always die in these blazers for some reason. The ones in my 2000 didn't work when I got it. I put in new ones and threw the stock ones in the trash.

 

Just replaced my rear speakers...same here....never looked back!