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post #1 of 11 Old 02-10-2011, 04:26 AM Thread Starter
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Bench Testing Radios

I'm trying to figure out how to bench test the radios with the dual
7 pin (grey & black) connectors. I know that the ground comes
from the case and that the pink or pink/white wire is the constant
12v, but that's as far as I can get...The red/black is for the ignition,
but when I apply 12v to it it sparks like a dead short. I can get the
button lights to light but not the "dial" or face. What am I missing??
Do I need to connect an antenna??? Oh, yeah, when I put it in the
car everything works???
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post #2 of 11 Old 02-10-2011, 01:22 PM
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Re: Bench Testing Radios

I dont have a schematic to look at. You do not need an antenna to turn it on. Grd, Hot +12vdc, and constant +12 for memory. All this will do is tell you if it turns on and off. To test the reciever takes a few more pieces of equipment.
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post #3 of 11 Old 02-10-2011, 01:53 PM
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Re: Bench Testing Radios

You probably already have a pin out, but if it helps:

Mopar Minivan Homeworld - Chrysler Car Stereo Pinout
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post #4 of 11 Old 02-10-2011, 02:02 PM
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Re: Bench Testing Radios

When you apply power to the switched/ignition 12V by touching the wire to a battery terminal or anything such it will give a good spark because there is alot of current draw to power the amplifiers and other magical circuitry in the radio, if you had a better contact method, such as using a switch you would not notice a spark.

I would say you do not have a short, unless the wire tries to weld itself to the terminal.

Last edited by yellonoma; 02-10-2011 at 02:03 PM. Reason: Typo
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post #5 of 11 Old 02-10-2011, 10:31 PM Thread Starter
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Re: Bench Testing Radios

Quote:
Originally Posted by yellonoma View Post
When you apply power to the switched/ignition 12V by touching the wire to a battery terminal or anything such it will give a good spark because there is alot of current draw to power the amplifiers and other magical circuitry in the radio, if you had a better contact method, such as using a switch you would not notice a spark.

I would say you do not have a short, unless the wire tries to weld itself to the terminal.
Thanks all!! I had the pin out from my shop manual, but I still can't get the "dial" to display/light up w/o hooking it up to the car....I've got to be missing something....
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post #6 of 11 Old 02-10-2011, 11:45 PM
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Re: Bench Testing Radios

I know you need the +12V constant AND the switched +12V, as well as the ground to get it to come on.
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post #7 of 11 Old 02-11-2011, 08:10 AM
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Re: Bench Testing Radios

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Originally Posted by cpfrock View Post
Thanks all!! I had the pin out from my shop manual, but I still can't get the "dial" to display/light up w/o hooking it up to the car....I've got to be missing something....
Well.. pin 3 on the gray connector, orange according to the site I posted above is for illumination, that would be either constant or switched 12V, either way you need power to that to get display I am assuming.. I haven't had the pleasure to bench test mine yet, this weekend probably i'll pull them out for shits.
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post #8 of 11 Old 02-12-2011, 05:52 AM Thread Starter
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Re: Bench Testing Radios

Quote:
Originally Posted by yellonoma View Post
Well.. pin 3 on the gray connector, orange according to the site I posted above is for illumination, that would be either constant or switched 12V, either way you need power to that to get display I am assuming.. I haven't had the pleasure to bench test mine yet, this weekend probably i'll pull them out for shits.
Well, don't do what I did!!! I was using a transformer from my model trains. I dabble with older American Flyer trains that run on AC!!!! I have no idea why, but that was the problem all this time!!! Once I switched to a DC transformer everything worked fine... Live and learn, and pass it on!!
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post #9 of 11 Old 02-12-2011, 11:58 AM
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Re: Bench Testing Radios

I acctually have a REF CD player out of an '07 ram pickup connected to a small motormaster battery booster pack on the bench in my garage, its connected to two small bookshelf speakers. Also has a 3.5mm input for my ipod! works great!
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post #10 of 11 Old 02-12-2011, 03:54 PM
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Re: Bench Testing Radios

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Well, don't do what I did!!! I was using a transformer from my model trains. I dabble with older American Flyer trains that run on AC!!!! I have no idea why, but that was the problem all this time!!! Once I switched to a DC transformer everything worked fine... Live and learn, and pass it on!!
Oh crap, that will do it, yeah the older ones use AC on the tracks... haha that's kinda funny... it didn't fry it?
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post #11 of 11 Old 02-18-2011, 07:33 PM Thread Starter
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Re: Bench Testing Radios

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Originally Posted by yellonoma View Post
Oh crap, that will do it, yeah the older ones use AC on the tracks... haha that's kinda funny... it didn't fry it?
Well I did smoke the power supply...Luckily I has a second parts player....

Now It plays for 18 -22 seconds, then Errors out??? At least I know it's not
AC related!!!
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