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Author Topic: OEM radios  (Read 15162 times)

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GTRS Fiero

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OEM radios
« on: May 02, 2020, 08:38:41 am »
I had a factory radio.  Some years ago, I installed a Monsoon radio from Paulv.  It came with an adapter.  Simple install.  No cut/splice.  The radio looks great and works fine, but dometimes the display is gibberish.

I purchased a radio from Fiero Tom.  The radio came with an adapter, and has the aux port.

I've actually met Fiero Tom.  Nice guy.  He demonstrated some options for me.
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Fierofool

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Re: OEM radios
« Reply #1 on: May 02, 2020, 09:53:25 am »
Did he provide a plug and play harness or one that required splicing into the main harness? 
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GTRS Fiero

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Re: OEM radios
« Reply #2 on: May 02, 2020, 10:03:52 am »
As I typed that post, I went looking for the box.  I just looked again.  No idea where it went.  Everything is in the box, somewhere.  I'll find it, because I'll need it to finish an article.
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Fierofool

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Re: OEM radios
« Reply #3 on: May 02, 2020, 02:01:33 pm »
I've seen several illustrations in his postings for the radios and they have the harness like you can buy at WalMart.  They only have the plug on one end and you must cut the factory harness underneath the dash and splice in. 
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GTRS Fiero

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Re: OEM radios
« Reply #4 on: June 16, 2020, 07:41:07 pm »
I found the box.  The harness is this.  Metra 70-1862.  Plugs on the ends.
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GTRS Fiero

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Re: OEM radios
« Reply #5 on: June 16, 2020, 09:22:37 pm »
I'm not taking credit for this, but this may have been by my request.  For any vendor with a good product, I sometimes work with that vendor to improve their product.
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Fierofool

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Re: OEM radios
« Reply #6 on: June 16, 2020, 09:36:15 pm »
This is the best way, in my opinion.  No need to cut the factory harness and no repinning.  It's plug and play.
https://replacementradios.com/gm-wiring-adapter-89-20-pin-radio-to-pre-89-12-pin-car-rs-gmwa-1862-a3-p-166.html?osCsid=418e1b030a22cefdee6706d646c34632
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There are three kinds of men:

1.    The ones that learn by reading.
2.    The few who learn by observation.
3.    The rest of them have to pee on the electric fence and find out for themselves.    Will Rogers

GTRS Fiero

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Re: OEM radios
« Reply #7 on: June 16, 2020, 09:40:07 pm »
It's basically the same plug.
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Fierofool

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Re: OEM radios
« Reply #8 on: June 16, 2020, 11:08:48 pm »
It is, but both ends are already attached. 
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TopNotch

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Re: OEM radios
« Reply #9 on: June 17, 2020, 09:12:39 am »
Quote from: GTRS Fiero on June 16, 2020, 09:40:07 pm
It's basically the same plug.
No, it adapts Delco 12-pin plug to Delco 20-pin mini-plug.
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GTRS Fiero

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Re: OEM radios
« Reply #10 on: June 19, 2020, 06:14:45 pm »
I'm trying to figure out if my radio works with the bass boost or not.
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Raydar

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Re: OEM radios
« Reply #11 on: June 20, 2020, 08:06:23 am »
Quote from: GTRS Fiero on June 19, 2020, 06:14:45 pm
I'm trying to figure out if my radio works with the bass boost or not.

The new Monsoon radio? Work with the subwoofer system?
Not without a quick mod...

The factory radio supplies high current switched DC to power the subwoofer amp.
The Monsoon also supplies switched DC, but it is not nearly enough current to run the amp. (Mostly used as a "turn-on" signal for power antennas, and such.)
The preferred method is to run "BATT" or "IGN" 12 volts through a relay, and use the switched 12V from the radio to turn on the relay.
Some people run "IGN" 12VDC directly to the amp, but that leaves it turned on whenever the key is on, whether the radio is on or not. (You may hear mild static or popping, or even alternator noise.)
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GTRS Fiero

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Re: OEM radios
« Reply #12 on: June 20, 2020, 08:14:01 am »
Hmmm.  Well, good to know.
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GTRS Fiero

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Re: OEM radios
« Reply #13 on: June 23, 2020, 06:27:56 pm »
Quote from: TopNotch on June 17, 2020, 09:12:39 am
Quote from: GTRS Fiero on June 16, 2020, 09:40:07 pm
It's basically the same plug.
No, it adapts Delco 12-pin plug to Delco 20-pin mini-plug.

Please excuse my ignorance.  I have both plugs side by side.  They appear identical.  Same pins on each end.  What am I missing?
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TopNotch

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Re: OEM radios
« Reply #14 on: June 23, 2020, 07:04:00 pm »
Real early Monsoon that had the old style connector? Normally the stock radio has the 12-pin connector, and the later Pontiac radio will have the smaller 20-pin connector, hence the need for an adapter.
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