Old school for sure. got a meter and can this be bench tested? try this and bare with me I am going on memory here..my experiences in a lot of junkyards locally is being recalled to a degree..now usually there is a yellow wire, black wire and orange wire on the gm radio.. yellow was memory and power antenna unles marked otherwise, orange was power and black was ground.. as to the rest, mine were always in pairs as in brown and brown/black or blue and blue/black or green and green/black.. if you only have 3 wires left to cover 4 speakers, then either you have left-right and a common ground between or a front-back with a ground in between..only way to know is by putting a meter on the wires and checking for voltage levels under the operating voltage of the unit.. fooling with the controls will tell you which wire is for what side, front,back,left,or right..now some radios have a preamp made into the radio and a seperate amp unit that looks like a cooling fin setup mounted up in and behind the dash near the radio and only a few wires connected the two together..the amp unit was connected to the speakers and usually it was left right in configuration because most speakers were in the front..on a few one speaker was in the dash and one was in the back deck behind the passengers side seat so I would say you have a left/right and a common ground...good luck
SOURCE: delco radio in 95 blazer
With key in "on" position, but pickup not started, press the "SET" button and the "channel up" button (aka "TUNE +"). "SET" appears in radio window.
Now the "SEEK" button will increment hours and the "SCAN" button will increment minutes.
Once correct time is set, press "SET" button again to get out of clock set mode. "SET" will disappear from radio window.
SOURCE: 1989 Chevy Truck , Stock Radio , Whining noise
Sounds like you have a capacitor problem.It could be a number of issues , but i suggest you check the alternator one first.
If you unplug the power cable to the back of the alternator and the whining goes away then replace the capacitor(usually only one bolt/screw)and you should be OK.
If not I sometimes have dissconnected the + wire from the HT coil when the car is running and the same applies,and if this works replace the capacitor or fit one if there isn't.
If none of this helps fit one to the + wires of your radio.
Please leave fair comment if I have helped you.
Thank you
Testimonial: "This is Great Info, I'll try all ideas . Ross "
SOURCE: I need to know the wiring diagram delco radio model output 161412
1992 Pontiac Grand Am Car Radio Stereo Audio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Orange
Car Radio Accessory Switched 12v+ Wire: Yellow
Car Radio Ground Wire: Black
Car Radio Illumination Wire: Gray
Car Stereo Dimmer Wire: Brown
Car Stereo Antenna Trigger: Pink
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Tan
Left Front Speaker Negative Wire (-): Gray
Right Front Speaker Positive Wire (+): Light Green
Right Front Speaker Negative Wire (-): Dark Green
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): Brown
Left Rear Speaker Negative Wire (-): Yellow
Right Rear Speaker Positive Wire (+): Dark Blue
Right Rear Speaker Negative Wire (-): Light Blue
Good luck and merry xmass
94 views
Usually answered in minutes!
×