Where to get Bose relay
Thread Starter
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Where to get Bose relay
Went for a drive yesterday. Put in a CD and ............no sound except a whine. Well, just damn. Radio stations freqs come up, antenna goes up and still no sound (or whine). Got back and checked the Helms and if I've done the diagnostics correctly, it points to the Amp relay under the DS knee bolster. Where can I get this relay? AutoZone? Advance Auto?
Thanks for the help.
Thanks for the help.
Thread Starter
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
Missing relay????
Is there an alternate location for the amp relay on a 91? I pulled the knee bolster and metal plate. Just to the right of the colunm is a two place relay holder. Per the Helms manual, the amp relay is in the one next to the column. I have nothing in that slot. No harness, no relay, nothing. WTF is up with that.
Any one have any ideas?
Any one have any ideas?
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
I think the diagram/picture in the book is wrong. There are two relays to the right of the steering column. One is the Bose relay the other one is used for the 2nd fuel pump used by the ZR1 so that one is missing on your car.
For testing, you can just swap one of the relays on the left side of the steering column. There are two of them.
One is for the AC Clutch and the other one is the starter enable relaly. All 3 relays are the same.
For testing, you can just swap one of the relays on the left side of the steering column. There are two of them.
One is for the AC Clutch and the other one is the starter enable relaly. All 3 relays are the same.
Thread Starter
Le Mans Master
Joined: Jul 2002
Posts: 5,818
Likes: 2
From: Alive and well in Burlington NC
OK then. Pulled one of the three relays from the left of the column and swapped with the one on the right. No joy. Head unit appears to work fine (powers up, accepts CDs, changes stations) but all I get from the speakers is a whine.
What to check next?
What to check next?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
As was mentioned, probably the CDM/Tuner is bad.
It contains the pre amp for the speakers.
It's a silver colored metal box located above the passengerside foot well area about 8 inches x 4 inches.
Very hard to remove. Easier if you remove the passenger side seat and track so you can lay on your back.
Disconnect the battery cable.
Once the plastic hush panel is removed, there are 4 or 5 wiring hanesses attached/clipped onto the bottom of a black plastic tray. Once those are disconnected there are two nuts on the side you loosen.
Note: Two of the harnesses are keyed the same. So mark the harness pairs before you seperate them.
The tray is hinged. There are 5 small electrical connects 2 on one side and 3 on the other side of the CDM. The antenna lead also needs to be pulled. It's kind of hidden a the top right side of the CDM and pulls off.
I'd say on a scale of 1 to 10, with 10 being the most difficult, I'd rate pulling and reinstalling the CDM an 8.
If you do replace the CDM there are two types.
One is for the Delco system and the other one is for the Bose system.
It contains the pre amp for the speakers.
It's a silver colored metal box located above the passengerside foot well area about 8 inches x 4 inches.
Very hard to remove. Easier if you remove the passenger side seat and track so you can lay on your back.
Disconnect the battery cable.
Once the plastic hush panel is removed, there are 4 or 5 wiring hanesses attached/clipped onto the bottom of a black plastic tray. Once those are disconnected there are two nuts on the side you loosen.
Note: Two of the harnesses are keyed the same. So mark the harness pairs before you seperate them.
The tray is hinged. There are 5 small electrical connects 2 on one side and 3 on the other side of the CDM. The antenna lead also needs to be pulled. It's kind of hidden a the top right side of the CDM and pulls off.
I'd say on a scale of 1 to 10, with 10 being the most difficult, I'd rate pulling and reinstalling the CDM an 8.
If you do replace the CDM there are two types.
One is for the Delco system and the other one is for the Bose system.
