1990 Bose Relay Location - ZR-1 Net Registry Forums

Dds1990 · 01-25-2017

Moving onto next winter project on BR 1990 #0106. So far I have replaced the Clutch master and slave cylinders thanks to Jim from Power Torque Systems, what a great guy. Ventured under the dash replaced the CHMBL switch, works now. Cleaned and remounted both air bag sensors and actually got that pita infl/seatbelt light to reset after a few tries. The Bose system is next. Radio will turn on but nothing is heard from speakers. Wanted to check the Bose relay but do not know exactly where its at before I start pulling speakers, as usual any help would be greatly appreciated.

billschroeder5842 · 01-25-2017

9 times out of ten your amps are defective if you have a Bose Gold.

However, if you get lucky (like me) your radio ECM is shot and needs replacing as well.

In my case I replaced the ECM and 4 amps. I now have an $800 radio!

WVZR-1 · 01-25-2017

Should've done the Bose relay while you were under the left side of the dash doing the CHMSL switch. You do now know the "how to" though. Get familiar with the 8A-201 section of your FSM. There's many answers there. One page after the wiring diagram for "most" components/circuits there a reference to 8A-201-X for images and also 8A-202-X for potential connector identification.

'90 Bose relay.png

Dds1990 · 01-25-2017

I just have the standard FSM and could not get the pic to download....I venture under there again if necessary just need to know where and what to look for.....im 6'1' 270...its nice under there..lol

Dds1990 · 01-25-2017

Bill I hope Im not lucky like you...

Dds1990 · 01-25-2017

WVZR1 Thanks got the pic to download....Ive got a electronics guy Im going to take a rear speaker to him and see what he can do. Although Im getting pretty good at taking the drivers seat out and crawling under there..getting out is the problem.

01-25-2017	#1
Dds1990 Join Date: Jul 2016 Location: INDIANA Posts: 86	1990 Bose Relay Location Moving onto next winter project on BR 1990 #0106. So far I have replaced the Clutch master and slave cylinders thanks to Jim from Power Torque Systems, what a great guy. Ventured under the dash replaced the CHMBL switch, works now. Cleaned and remounted both air bag sensors and actually got that pita infl/seatbelt light to reset after a few tries. The Bose system is next. Radio will turn on but nothing is heard from speakers. Wanted to check the Bose relay but do not know exactly where its at before I start pulling speakers, as usual any help would be greatly appreciated.

01-25-2017	#2
billschroeder5842 Join Date: Nov 2016 Location: Southlake, TX Posts: 584	Re: 1990 Bose Relay Location 9 times out of ten your amps are defective if you have a Bose Gold. However, if you get lucky (like me) your radio ECM is shot and needs replacing as well. In my case I replaced the ECM and 4 amps. I now have an $800 radio! __________________ Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker

01-25-2017	#3
WVZR-1 Join Date: Oct 2004 Posts: 1,889	Re: 1990 Bose Relay Location Should've done the Bose relay while you were under the left side of the dash doing the CHMSL switch. You do now know the "how to" though. Get familiar with the 8A-201 section of your FSM. There's many answers there. One page after the wiring diagram for "most" components/circuits there a reference to 8A-201-X for images and also 8A-202-X for potential connector identification. '90 Bose relay.png Last edited by WVZR-1; 01-25-2017 at 05:46 PM.

01-25-2017	#4
Dds1990 Join Date: Jul 2016 Location: INDIANA Posts: 86	Re: 1990 Bose Relay Location I just have the standard FSM and could not get the pic to download....I venture under there again if necessary just need to know where and what to look for.....im 6'1' 270...its nice under there..lol

01-25-2017	#5
Dds1990 Join Date: Jul 2016 Location: INDIANA Posts: 86	Re: 1990 Bose Relay Location Bill I hope Im not lucky like you...

01-25-2017	#6
Dds1990 Join Date: Jul 2016 Location: INDIANA Posts: 86	Re: 1990 Bose Relay Location WVZR1 Thanks got the pic to download....Ive got a electronics guy Im going to take a rear speaker to him and see what he can do. Although Im getting pretty good at taking the drivers seat out and crawling under there..getting out is the problem.