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Old 05-05-2014   #1
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no AM on aftermarket radio

Hi. First time on, need some help.
Punto Evo eleganza.2010.
Changed head unit to a GPS/DVD multimedia player. Connections use original harness with added canbus adapter. Everything works on unit, turn on,GPS etc.. however can't tune in any AM stations, yet FM tunes in. Thought it might be aerial but just tried original unit and AM works perfectly. Any ideas ?
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Old 06-05-2014   #2
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Re: no AM on aftermarket radio

Different countries/continents use different frequency ranges I believe. My guess is the AM range on your unit is not for UK/Europe. Do the specs state the ranges? Can you compare with the OE specs?
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Old 06-05-2014   #3
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Re: no AM on aftermarket radio

Thanks for response.
Unit is set to Europe. Can receive FM but not good signal. Am searches but poor signal. Have posted on ICE section as I think it could have something to do with switching radio amplifier on. It's done by canbus on original unit . This has canbus adapter but I don't think it is switching amp on.
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Old 06-05-2014   #4
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Re: no AM on aftermarket radio

Who the f**k listens to am
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Old 07-05-2014   #5
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Re: no AM on aftermarket radio

Quote Originally Posted by 2668GRIFFIN View Post
Who the f**k listens to am
Sadly not karm777.
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Old 07-05-2014   #6
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Re: no AM on aftermarket radio

Talksport , and five.
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Old 07-05-2014   #7
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Re: no AM on aftermarket radio

Does Evo have seperate radio amp or aerial amplifier ? Anyone got a wiring diagram for Evo.
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Old 07-05-2014   #8
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Re: no AM on aftermarket radio

Apparently need to run a wire to switch amp on. Can anyone give me more info please..as I can't seem to find a wiring diagram for Evo.
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Old 07-05-2014   #9
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Re: no AM on aftermarket radio

Hello,

Your antenna connection is good ? If loose it can be hard to tune.

Antenna amplifier is powered by pin 5 on connector A of headunit.Pin should be numbered on connectors.

If not, it should be the one with a switch symbol, check before connecting.
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Old 07-05-2014   #10
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Re: no AM on aftermarket radio

Thanks , but there are only four wires on car harness iso block. Live , ground, canA and canb, that's what's puzzling me.
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Old 07-05-2014   #11
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Re: no AM on aftermarket radio

Is that the actual car ISO block, or is there an extension fitted and you need to go back a bit further?

If the aerial amp is close to the head unit, often it is fed direct, not via the ISO plug. There also might be a small plug to connect to the smaller blocks on the radio. These may have dropped behind the unit and not yet seen by you. If the aerial amp is there, is its feed loose, or if not follow it to see what is on the end and to what it connects is anything. An alternative feed is the electric aerial output on the main power connectors.
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Old 08-05-2014   #12
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Re: no AM on aftermarket radio

Thanks. This is the connections on the car harness. This plug which consists of power and speaker connections plug directly to unit along with smaller blue and me plug. If I plug these into original radio everything is fine. Plug the same into aftermarket and doesn't seem amp is switching. Only other connection on new unit is aerial socket and canbus adapter. This has 3 flying leads coming out as well. They are, 12v switched, ground, and +12v rear.
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Old 08-05-2014   #13
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Re: no AM on aftermarket radio

Quote Originally Posted by karm777 View Post
Thanks , but there are only four wires on car harness iso block. Live , ground, canA and canb, that's what's puzzling me.
Humm not so useful in this case.

Ca you post a picture of you unit actual schematic ?
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Old 08-05-2014   #14
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Re: no AM on aftermarket radio

Thanks . Here's pic of unit top.
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Old 08-05-2014   #15
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Re: no AM on aftermarket radio

And one of original radio.
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