CDM 1250 remote head disables programability?

[eportel6607]

Guys is it normal when you have a factory Motorola remote head kit designed for the CDM1250 connected that the CPS software is not able to connect and read the radio but when the remote kit is removed and the head installed on the radio directly it reads and writes to the radio fine? This can't be...can it?
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[SteveC0625]

Guys is it normal when you have a factory Motorola remote head kit designed for the CDM1250 connected that the CPS software is not able to connect and read the radio but when the remote kit is removed and the head installed on the radio directly it reads and writes to the radio fine? This can't be...can it?
c

It happens and it's been discussed many times on the Motorola forums across the net.

The first thing to do is to make sure you are using the correct Motorola 10 pin remote cables between the radio and the control head. These units can be remoted with standard CAT-5 cables and work fine, but the 9th and 10th pins are needed for programming. So use the right cable for starters.

If the unit still won't program, you are stuck with disassembling the remote head and radio and placing the head back on the radio. In under-dash configuration, it will program fine. I've never heard a definitive reason for this, but speculation centers around the flat cabling inside the control head.

The search function should help you find some of these threads if you want more discussion, but the short answer is what I have told you.

 

[eportel6607]

Interesting. Thanks Steve. I actually did a search prior to posting this message. Obviously the wording I used didn't trigger a results but I appreciate you taking the time to let me know what the deal is with anomaly.
BTW it's a factor 10 pin remote cable.

Thanks again,
C

 

[mmckenna]

I have a radio that did this -for a while-. Factory 10 pin RJ50 cable, real Motorola RIB with new 9v battery, but a home made programming cable.

I tried using an "official" Moto programming cable, and it still happened. I'd have to pull the radio out of the truck, reassemble, as Steve said, program and then reinstall.

A while later, I tried again without taking it out, and it worked fine. No idea what changed, it just started working.

One thing you can do is to use the 20 pin connector on the back of the radio. Motorola has a cable for doing this: AARKN4083A
That should allow you to program without taking the radio apart. You can brew your own using this diagram: http://www.batlabs.com/images/cdmprog.gif If my radio ever stops programming, I'll make one of these guys and give it a try. Already have the parts…..

 

[eportel6607]

Ahhh cool. I never thought that you could program the radio from the acc port. Ok I'll keep that in mind. Thanks!
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