Bose Speaker Relay?
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,313
Likes: 5
From: Middle Tennessee
Bose Speaker Relay?
None of my speakers in my Bose system are working. The antenna goes all the way up, but no sound. They were working great the last time I had the car out. The wiring diagram points to the Bose Speaker Relay as the probable culprit. Thoughts/suggestions before I buy another relay? Thanks in advance for any help.
Last edited by proracr; Apr 12, 2011 at 05:11 PM.
Race Director
Joined: Sep 2003
Posts: 16,836
Likes: 337
From: Database Error Indiana
Its only about $12. Finding it under the dash is the hard part. Its bolted in place up by the computer. Once I located it, I reached up, unplugged it and left the old one in place. Plugged in the new one and just stuffed it up in there.
Le Mans Master
Joined: Jan 2006
Posts: 5,620
Likes: 206
From: Orlando FL
This is a 94, I beleive the relay is in the rear behind the pass seat.
The speaker amplifiers need 12 volts to operate and sounds like you might have lost it. It comes from the Bose relay (feeds all amps) which hangs on the wire harness near the receiver/ preamp. The voltage comes from fuse 37 so check that first. The relay is controlled by radio head and the receiver. The radio head sends the signal to the receiver to close a switch and then voltage from fuse 4 goes to the Bose relay and turns it on (closes it).
The speaker amplifiers need 12 volts to operate and sounds like you might have lost it. It comes from the Bose relay (feeds all amps) which hangs on the wire harness near the receiver/ preamp. The voltage comes from fuse 37 so check that first. The relay is controlled by radio head and the receiver. The radio head sends the signal to the receiver to close a switch and then voltage from fuse 4 goes to the Bose relay and turns it on (closes it).
Team Owner
Joined: Jan 2003
Posts: 20,301
Likes: 240
From: Summerland B.C. Canada
This is a 94, I beleive the relay is in the rear behind the pass seat.
The speaker amplifiers need 12 volts to operate and sounds like you might have lost it. It comes from the Bose relay (feeds all amps) which hangs on the wire harness near the receiver/ preamp. The voltage comes from fuse 37 so check that first. The relay is controlled by radio head and the receiver. The radio head sends the signal to the receiver to close a switch and then voltage from fuse 4 goes to the Bose relay and turns it on (closes it).
The speaker amplifiers need 12 volts to operate and sounds like you might have lost it. It comes from the Bose relay (feeds all amps) which hangs on the wire harness near the receiver/ preamp. The voltage comes from fuse 37 so check that first. The relay is controlled by radio head and the receiver. The radio head sends the signal to the receiver to close a switch and then voltage from fuse 4 goes to the Bose relay and turns it on (closes it).
Le Mans Master
Joined: Jan 2006
Posts: 5,620
Likes: 206
From: Orlando FL
Here is a schematic for some help.
Don’t be buying a relay yet or on a guess, make a few voltage measurements first.
Turn radio on!
First see if there is 12 volts on pin 4 of the relay. If not, then check pin 1 for 12 volts, if it's there then check to see if relay is energized. Do this by checking pin 5 for 12 volts. If no voltage then you need to back up to the receiver, radio head and voltage feed. If you have voltage there (pin 5) and there is no voltage at pin 4 when there is voltage at pin1, then the relay could be bad.
Make sure pin 2 is at ground.
You get the idea and also check the connector connections and pins for bad contacts.
Don’t be buying a relay yet or on a guess, make a few voltage measurements first.
Turn radio on!
First see if there is 12 volts on pin 4 of the relay. If not, then check pin 1 for 12 volts, if it's there then check to see if relay is energized. Do this by checking pin 5 for 12 volts. If no voltage then you need to back up to the receiver, radio head and voltage feed. If you have voltage there (pin 5) and there is no voltage at pin 4 when there is voltage at pin1, then the relay could be bad.
Make sure pin 2 is at ground.
You get the idea and also check the connector connections and pins for bad contacts.
Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,313
Likes: 5
From: Middle Tennessee
I checked fuses #5 and #37, then pulled the relay out and tapped it a couple of times. Tried the radio and the speakers are working once again. I hate intermittent problems. I will probably go ahead an order a new speaker relay, just in case. 
I don't quite understand the necessity for this relay in the first place as there is also another relay in this circuit in the preamp. The more relays.......the more problems. Let's over complicate things, why don't we? If there is one thing that I have learned in life it's to use the K.I.S.S. principle (Keep Things Simple Stupid).
I don't quite understand the necessity for this relay in the first place as there is also another relay in this circuit in the preamp. The more relays.......the more problems. Let's over complicate things, why don't we? If there is one thing that I have learned in life it's to use the K.I.S.S. principle (Keep Things Simple Stupid).
Last edited by proracr; Apr 13, 2011 at 05:22 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
