[S61Dan]

Hi, I am fixing my friend's Cadillac for him. Had an aftermarket radio in that he pulled out. I cut out all of the aftermarket wiring and put the oem radio back in with oem connectors he bought
There was a few wires on the oem conector that didn't match the harness on the car. I think I have something wired wrong as I only get "fm" and "st" on the display and a little static in the front speakers.

 

[carnut]

Stamped on the top of the OEM radio case is the wiring diagram. This OEM radio, is it the car's original radio or something recently bought? Some had digital read outs, others were analog displays, what do you have?

 

[S61Dan]

I am assuming it is an original radio. No digital readouts or nothing. It looks like it came out of a junkyard. I am suspecting something is up with the radio. Not sure. Only a couple of wire colors didn't match. All the speaker wires and everything matched.
I had a Yellow w/black strip on the connector side and a solid yellow on the chassis side and 1 or 2 others. I did see that diagram on the radio. Wasn't sure how to read the orientation of it haha

 

[bigm57ict]

Being a Fleetwood, it may have had a digital tune radio originally. They were only available on the Fleetwood in '78. (standard or optional? Does anyone know?)
They became standard on Deville in '79.

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[Bro-Ham]

ETR radio with 8-track was optional only on Fleetwood Brougham (and Seville) in 1978. Standard on 1978 Fleetwood was the old school AM/FM stereo push button signal seeking radio. Also optional were push button AM/FM stereo with: CB, 8-track, and 8-track/CB combo. ETR radios became standard on all 1979 Cadillacs.