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I want to test a 67 Olds AM/FM radio that I bought for my 442. I want to know the wire colors for the unit. My shop manual shows only BLK with a WHITE stripe. Also my radio has a harness with a 9 wire connector. I just need to know how is the best way to bench test this unit. My car doesn't have the mateing connector any more. I am only using the stock speaker locations.
Thanks
A stock 67 radio only has 3 wires. There's an antenna jack on one side, and a three wire plug on the other. I believe black wire in the car goes to the middle pin (you can see it is just connected to the chassis of the radio, and it is ground. Green in the car is power for the radio, and also the light, I believe. Blue in the car is the positive for the one speaker. If you have the biphonic speaker adapter, another harness, one blue wire, will be active, and it's the positive for the other speaker.
To bench test that radio. 12V THROUGH A FUSE to the positive, ground back to the battery, pos speaker out to the speaker, and speaker neg back to the battery neg.
A 9 wire connector sounds like positive power and 4 pairs of speaker wires. Could you put a picture of the radio up? I doubt it is a 67 AM/FM both from what you describe, and the fact that the 67 AM/FM A body Olds radio is expensive since there are so few so you probably have something else.
The nine-wire connector sounds kind of like an am-fm STEREO unit, where the nine-wire connector goes to the multiplex unit, which would be separate from the radio. Without the multi-plex unit to complement the radio unit, the stereo aspect of the radio will not work.
Per what Koda said, the radio box is powered as he stated. But if the radio box you have is a stereo unit, you will only get sound (and just half the sound) out of the front speaker.
I always favored am-fm non-stereo units of that period, over the stereo units. It just seems to me that stereo reception with those early stereo units just wasn't that good. As well, with the non-stereo am-fm radios, you don't have to deal with the multi-plex unit.
My info shows an option code for model year 1967 of U58 for an AM-FM stereo radio. I don't see an option code for a stereo radio before the 1967 model year.
Perhaps the U58 option was not available for the A-body and just for the bigger cars?
I am including some pics that may help to identify my radio. I bought this unit years ago from a dealership's owner that had alot of old used parts.
I prefer the stock look versus the new state of art units.
Is there a sticker somewhere on the radio box that has a part number? That might help in determining where this radio belongs. The face looks very much like the AM-FM stereo radio in my '69 4-4-2.
The plug you took apart is definitely for the multiplex unit on an early AM-FM stereo radio ('67-'70 at least, and possibly '71). Somewhere in the '71 or '72 model years the multiplex unit was incorporated into the radio box and the extra box was no longer needed.
Well, there are alternatives. Some people buy the AM/FM. Some people buy AMs and have them converted to new guts and features. You may like that method, it would look stock, yet do cool tricks like connect to your phone.
July 17th, 2018, 06:25 AM
