Where's the Relay
Thread Starter
Burning Brakes
Joined: May 2010
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Where's the Relay
I have a 1987 Coupe with Delco Bose Radio. I have no power on the Pink wire to my right door or hatch speakers. I have gone thru my FSM and the Electrical Supplement trying to find the location of the Speaker Amplifier Relay which provides power to all 4 amplifiers. I cant locate the relay.....anyone know where it is. This way I can work back from the relay to find where I am loosing power.
Thank You
8Valve
Thank You
8Valve
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
The relay will be just to the right of the center of the dash. Pull the center dash trim, remove the radio, and look for a relay to the right of the cavity.
In the Electrical Supplement book, go to page 8A-201-6. It's shown in "Figure B"; not a really good pic but once you get the radio out, follow the wire harness that is above the radio and go to the right.
With the radio on, check for power from the pink wire in cavity C2. Also check for power from the orange wire going into the relay. That wire comes from the courtesy lights and clock fuse. Check the fuse (15A).
The relay sends current to all 4 speakers. There will be a pink/black wire coming out of the relay (Cavity A) that goes to a splice (S232) inside the harness above the radio where the pink/black wire goes to the left speakers and a solid pink goes to the right speakers. If the right speakers aren't working, it may be a problem with the wires coming from the solid state side of the radio (grn/lt. grn and lt. blue/dk.blue) or the radio internals are not working for that side.
In the Electrical Supplement book, go to page 8A-201-6. It's shown in "Figure B"; not a really good pic but once you get the radio out, follow the wire harness that is above the radio and go to the right.
With the radio on, check for power from the pink wire in cavity C2. Also check for power from the orange wire going into the relay. That wire comes from the courtesy lights and clock fuse. Check the fuse (15A).
The relay sends current to all 4 speakers. There will be a pink/black wire coming out of the relay (Cavity A) that goes to a splice (S232) inside the harness above the radio where the pink/black wire goes to the left speakers and a solid pink goes to the right speakers. If the right speakers aren't working, it may be a problem with the wires coming from the solid state side of the radio (grn/lt. grn and lt. blue/dk.blue) or the radio internals are not working for that side.
Last edited by c4cruiser; Nov 25, 2010 at 04:26 PM.
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Last edited by Ray Quayle; Nov 25, 2010 at 04:41 PM.
Team Owner
Joined: Dec 1999
Posts: 34,873
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From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Thanks Ray!! My scanner is not working otherwise I would have scanned the page and posted it up.
I had to replace the same relay in my 87 a couple years ago. Was not a fun job, but my kegerator was only 4 steps away...
I had to replace the same relay in my 87 a couple years ago. Was not a fun job, but my kegerator was only 4 steps away...
Thread Starter
Burning Brakes
Joined: May 2010
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The relay will be just to the right of the center of the dash. Pull the center dash trim, remove the radio, and look for a relay to the right of the cavity.
In the Electrical Supplement book, go to page 8A-201-6. It's shown in "Figure B"; not a really good pic but once you get the radio out, follow the wire harness that is above the radio and go to the right.
With the radio on, check for power from the pink wire in cavity C2. Also check for power from the orange wire going into the relay. That wire comes from the courtesy lights and clock fuse. Check the fuse (15A).
The relay sends current to all 4 speakers. There will be a pink/black wire coming out of the relay (Cavity A) that goes to a splice (S232) inside the harness above the radio where the pink/black wire goes to the left speakers and a solid pink goes to the right speakers. If the right speakers aren't working, it may be a problem with the wires coming from the solid state side of the radio (grn/lt. grn and lt. blue/dk.blue) or the radio internals are not working for that side.
In the Electrical Supplement book, go to page 8A-201-6. It's shown in "Figure B"; not a really good pic but once you get the radio out, follow the wire harness that is above the radio and go to the right.
With the radio on, check for power from the pink wire in cavity C2. Also check for power from the orange wire going into the relay. That wire comes from the courtesy lights and clock fuse. Check the fuse (15A).
The relay sends current to all 4 speakers. There will be a pink/black wire coming out of the relay (Cavity A) that goes to a splice (S232) inside the harness above the radio where the pink/black wire goes to the left speakers and a solid pink goes to the right speakers. If the right speakers aren't working, it may be a problem with the wires coming from the solid state side of the radio (grn/lt. grn and lt. blue/dk.blue) or the radio internals are not working for that side.
snow/ice hits us. Looking at the Pink wire, I have 0 volts between it and the black (ground) wire, with radio on playing. I feel its somewhere, either at splice S232 or after it. My left door and hatch spkr's work fine.
Thank You
8Valve
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I'm pretty sure on mine, that splice splits front and rear, not left and right. Mine is pink/black from that splice to front speaker/amps and solid pink to the rears. You've verified 0v at the right hand speakers I assume?
Team Owner
Joined: Jan 2003
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From: Summerland B.C. Canada
The relay is attached to the left side of dash support brace with two 7mm hex head screws. I have crash pad delete, so I was able to get at it from the front. You might want to pull the seat, if your attacking from below.
Thread Starter
Burning Brakes
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Nasty working under the dash. I am going to take my SHRINK pills and shrink down to 3 inches tall and then just walk around under the dash ha ha ha. Thanks for your correction !
8Valve
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Thread Starter
Burning Brakes
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Update;
The Right rear speaker is now working. I had been metering the 12 volt pink line in relation to the Black ground wire at the speaker, it was Zero Volts. Today I metered the Pink wire in relation to the Black ground wire at the rear left speaker. Walla..I had 12 volts. Thus the ground wire on the right rear speaker was broken. Upon close investigation, a screw holding on the hatch trim had been screwed right thru the ground wire, cutting it in half. The speakers on the right side have not worked since I bought the Vette in May. Sure sounds good to have both rear spkr's working. Now to the front right door Spkr. Arrg, I dont see any way to get to the amplifier to meter it without tearing the door apart. I'll need a large bottle of Irish Cream tomorrow LOL !
8Valve
The Right rear speaker is now working. I had been metering the 12 volt pink line in relation to the Black ground wire at the speaker, it was Zero Volts. Today I metered the Pink wire in relation to the Black ground wire at the rear left speaker. Walla..I had 12 volts. Thus the ground wire on the right rear speaker was broken. Upon close investigation, a screw holding on the hatch trim had been screwed right thru the ground wire, cutting it in half. The speakers on the right side have not worked since I bought the Vette in May. Sure sounds good to have both rear spkr's working. Now to the front right door Spkr. Arrg, I dont see any way to get to the amplifier to meter it without tearing the door apart. I'll need a large bottle of Irish Cream tomorrow LOL !
8Valve
- 1986 Original Owner -
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Nice goin' Paul. Let us know how you make out with the other one.
Melting Slicks
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From: WAY UPSTATE NY
Update;
The Right rear speaker is now working. I had been metering the 12 volt pink line in relation to the Black ground wire at the speaker, it was Zero Volts. Today I metered the Pink wire in relation to the Black ground wire at the rear left speaker. Walla..I had 12 volts. Thus the ground wire on the right rear speaker was broken. Upon close investigation, a screw holding on the hatch trim had been screwed right thru the ground wire, cutting it in half. The speakers on the right side have not worked since I bought the Vette in May. Sure sounds good to have both rear spkr's working. Now to the front right door Spkr. Arrg, I dont see any way to get to the amplifier to meter it without tearing the door apart. I'll need a large bottle of Irish Cream tomorrow LOL !
8Valve
The Right rear speaker is now working. I had been metering the 12 volt pink line in relation to the Black ground wire at the speaker, it was Zero Volts. Today I metered the Pink wire in relation to the Black ground wire at the rear left speaker. Walla..I had 12 volts. Thus the ground wire on the right rear speaker was broken. Upon close investigation, a screw holding on the hatch trim had been screwed right thru the ground wire, cutting it in half. The speakers on the right side have not worked since I bought the Vette in May. Sure sounds good to have both rear spkr's working. Now to the front right door Spkr. Arrg, I dont see any way to get to the amplifier to meter it without tearing the door apart. I'll need a large bottle of Irish Cream tomorrow LOL !
8Valve
Thread Starter
Burning Brakes
Joined: May 2010
Posts: 941
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Thread Starter
Burning Brakes
Joined: May 2010
Posts: 941
Likes: 10
Made out great on the Right front door speaker today. First this morning was to find the Pink/Black wire and the Black wire where they enter the door. I metered both and had 12 volts into the door.
Pulled the door panel off and then pulled out the speaker and unplugged it. Tested speaker and its shot. So all I need to find is a 1987 Corvette Door Speaker for the Bose/Delco system. I will post over on the parts for sale forum later. Actually, both speaker problems was easy to find/fix. One more thing off the Vette Winter 'to do list'.
8Valve
Pulled the door panel off and then pulled out the speaker and unplugged it. Tested speaker and its shot. So all I need to find is a 1987 Corvette Door Speaker for the Bose/Delco system. I will post over on the parts for sale forum later. Actually, both speaker problems was easy to find/fix. One more thing off the Vette Winter 'to do list'.
8Valve
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Replaced Relay, Now blowing Radio Fuse
Well, I know the last response was over a year ago but I'm praying someone sees this.... Sort of akin to an SOS on a deserted island....
I have a pristine '86 but the speakers stopped working about a year ago. All research pointed to the relay as described above and all the information worked out well. I located and replaced the relay with a new one from a catalog store and hooked most everything back up. I turned on the ignition and turned on the radio and blew the radio fuse instantly. I found another 10A fuse and tried again with the same result. So, I took out the new relay and put everything back together after killing the better part of a day.....
Anybody know why I would blow the radio fuse with a new relay yet everything works (radio, clock, antenna) except the speakers with the old relay?
I have a pristine '86 but the speakers stopped working about a year ago. All research pointed to the relay as described above and all the information worked out well. I located and replaced the relay with a new one from a catalog store and hooked most everything back up. I turned on the ignition and turned on the radio and blew the radio fuse instantly. I found another 10A fuse and tried again with the same result. So, I took out the new relay and put everything back together after killing the better part of a day.....
Anybody know why I would blow the radio fuse with a new relay yet everything works (radio, clock, antenna) except the speakers with the old relay?
Race Director
Joined: Dec 2006
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Well, I know the last response was over a year ago but I'm praying someone sees this.... Sort of akin to an SOS on a deserted island....
I have a pristine '86 but the speakers stopped working about a year ago. All research pointed to the relay as described above and all the information worked out well. I located and replaced the relay with a new one from a catalog store and hooked most everything back up. I turned on the ignition and turned on the radio and blew the radio fuse instantly. I found another 10A fuse and tried again with the same result. So, I took out the new relay and put everything back together after killing the better part of a day.....
Anybody know why I would blow the radio fuse with a new relay yet everything works (radio, clock, antenna) except the speakers with the old relay?
I have a pristine '86 but the speakers stopped working about a year ago. All research pointed to the relay as described above and all the information worked out well. I located and replaced the relay with a new one from a catalog store and hooked most everything back up. I turned on the ignition and turned on the radio and blew the radio fuse instantly. I found another 10A fuse and tried again with the same result. So, I took out the new relay and put everything back together after killing the better part of a day.....
Anybody know why I would blow the radio fuse with a new relay yet everything works (radio, clock, antenna) except the speakers with the old relay?
