siren134
Member
How do you bypass the Ignition Sense function on the radio so I can reprogram it without buying the cable??
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CDM1250 Ignition Sense bypass
- Thread starter siren134
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fineshot1
Member
Which cable are you trying to avoid the purchase of, the ignition sense or programing cable ?
Your question is a bit confusing the way you asked it.
Not sure but I think this is what you seek - If you short together the accessory connector pins 7 & 9 and then apply power to the main power cable the radio will power up. Take a look over at batlabs for the actual accessory conn pinout diagram.
siren134
Member
Radio will not turn on without the Ignition sense cable connected , that's why I was looking to bypass it. I have programing software and cable only on my desktop.
DPapay
Member
cdm mobile
If the mobile will not power up by pressing the volume control, but will only power up with the ignition cable, pin 10, then the radio is programmed in cps for "follow ignition only". This can be bypassed by a jumper on pins 10 and 4, not 7 and 9 like a previous post. 10 and 4 jumper should work unless pin 4 has been changed to another function in cps. Comes default as null though.
If the mobile will not power up by pressing the volume control, but will only power up with the ignition cable, pin 10, then the radio is programmed in cps for "follow ignition only". This can be bypassed by a jumper on pins 10 and 4, not 7 and 9 like a previous post. 10 and 4 jumper should work unless pin 4 has been changed to another function in cps. Comes default as null though.
fineshot1
Member
I did not mention shorting pins 7 & 9 off the cuff. I do radio installs and repair as a profession every day at work. This is an un-documented method of bypassing the ignition sense. It works and I have radios on my bench and in the field in service that I have done this to. I did not make it up.
DPapay
Member
I also work on this stuff every day. I guess I cannot say you are wrong. If your mobile works that way? Then that's the way it works. Before I posted though, I had a new CDM1250 on my bench, just for kicks I shorted 7 and 9, the radio did not power up. Traditionally 7 and 9 are the default emergency switch jumper for the radius line. Please do not take any offense to my post, that was not my intention.
fineshot1
Member
No offense taken. Pin 7 is ground and 9 is listed as the "Tri State Emergency Switch" and if it is at its default setting and not programed for any other use it should work as I described. 7 & 9 get shorted and once the main power plug on the CDM gets power the radio should power up. Its worked that way on every one I have in the field(about a dozen) and the one I have on the bench. I learned this on batlabs about a year or two ago. However that is not to say Moto did not make any changes on newer version radios cause the ones I have done this to with success are all older radios.
hey, so i tried to short pin 7 and 9, and i programmed the radio on "follow ignition only" but it didnt trun on when i started the car!
so im getting the power from a cigarette outlet (15amp)! also have a external speaker plugged! all pins are on null except pin 1. any ideas?
mmckenna
I ♥ Ø
You need +12 volts to pin 10 to trigger the ignition sense.
That is the worst possible way to program the CDM's. The way you have programmed it, the radio will only come on when +12vdc is applied to Pin #10. That's a real problem when the radio is on the bench. Set them for On/Off & Ignition. They won't require the ignition sense to power up, but you will have to turn them on manually by pressing the center of the volume knob.
If you want the radio to come on when you start the car, run your main power cable hot to the battery and ground to a factory grounding point. Then take run/accessory +12v and run it to pin 10 on the accessory port.
The 7/9 shorting trick requires 9 to be properly programmed. It works on some radios and not on others. While some folks swear by it, I prefer to use ignition sense in the CDM's the way Motorola advises in the install manual.
lemme see if i understood you correct, so you are saying connect the jack to pin 10 (i have the ignition kit) and connect the other end to the positive side of battery? or can i connect the other end (coming from pin10) to positive wire going to the radio?
also, i know you said it's not a good way to do it, but just wanna know, if i leave it like how i programmed it, is it gonna work if i connect the pin 10 to the radio's power source?
thanks for replying!
do you want the radio on and off with your key? then put pin 10 to a source that come on and off with the key It you connect it to the main it will stay on and have to be turned on and off when you get into and out of the car..
yes i want it to be turned on and off when i start the car, the problem is i dont want to do anything to the ignition or mess up the fuse box. so im trying to figure out where else i can connect the other end of pin 10
"Ignition Sense" doesn't mean you're connecting the radio directly to the ignition. The ignition sense cable just needs to receive power from a "switched" acc circuit to turn the radio on. They make a fuse adapter that allows you to add a second accessory to an individual circuit.
Here's one.
https://www.amazon.com/dp/B011WH6HP...t=&hvlocphy=9059779&hvtargid=pla-319796936125
In the past, I have run them off of the AM/FM stereo circuit.
Sent from my HTC One A9 using Tapatalk
davidzimmerman
Member
Fire125 i use FUSE TAPS for IGN on\off
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ohh ok i got you. i thought that means it has to go to ignition. ok so all i have to do is buy one of those and connect it to the fuse box and run the other end to the pin 10?
1-does it matter which fuse i connect it to? has to be a certain number?
2- is there anywhere else that i can connect it to rather than the fuse box? what happens if i connect it to a positive cigarette outlet?
thanks all for replying.
Amir
1-does it matter which fuse i connect it to? has to be a certain number?
2- is there anywhere else that i can connect it to rather than the fuse box? what happens if i connect it to a positive cigarette outlet?
thanks all for replying.
Amir
davidzimmerman
Member
Fure Tap is the BEST you can make it HOT or IGN from the fuse its up to you the IGN would turn it on and off with the key.you need a TEST light to find a IGN on\off fuse to use the Fuse Tap Amazon sells them.
forgot the Cigarette Outlet
forgot the Cigarette Outlet
tnx for replying. i'll order that part and find somewhere in the fuse box to add it!
in the fuse box, what apm i should be looking for? any min or max number?
davidzimmerman
Member
any 5 AMP IGN will do or a 10 AMP
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