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Ignition Sense - Motorola Astro Spectra

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MOCOMD1

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Is the 12v Ignition Sense connection of the 16 pin accessory connector absolutely needed to power on?

I have power connected so either the radio is bricked or it is required.
 

fineshot1

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Is the 12v Ignition Sense connection of the 16 pin accessory connector absolutely needed to power on?

I have power connected so either the radio is bricked or it is required.

If you are running all conventional repeaters and simplex then it really does not matter.

If you have a trunking system setup in the programing then the ignition sense is necessary
for deaffiliation on powering off via ignition +V loss.

yes it has to have it to work It is also your speaker connection

The speaker connection depends on whether it is a chasis mount or remote head mount.

If it is a chasis mount then you are correct. If it is a remote head mount the speaker
connection is on the control cable near the head end.
 

MOCOMD1

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If you are running all conventional repeaters and simplex then it really does not matter.

If you have a trunking system setup in the programing then the ignition sense is necessary
for deaffiliation on powering off via ignition +V loss.

It is a trunking system, but not having the ignition sense connected stop the radio from powering on all together?



The speaker connection depends on whether it is a chasis mount or remote head mount.

If it is a chasis mount then you are correct. If it is a remote head mount the speaker
connection is on the control cable near the head end.

It is a chasis (dash) mount.
 

kb5udf

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No ignition sense power = no power up

Ok I think the subject says it all. Yes, if you don't have power to ignition sense, the radio will NOT power up at all. In practice you can just connect the ignition sense wire off of the 16 pin connector to the same +12volt source as the main power cable, or splice them together right off the back of the radio.

You can read about all the pinouts on the connector on batlabs.
 

fineshot1

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In practice you can just connect the ignition sense wire off of the 16 pin connector to the same +12volt source as the main power cable, or splice them together right off the back of the radio.

This is NOT a good idea and NOT recommended by motorola. As I said above it is necessary to
have the ignition sense hooked up properly for the radio to de-affiliate from the system. This may
seem trivial to most hams but is important from the system DB admins (or whomever runs the
trunking system) perspective. With thousands of radios on a trunk system it is necessary to
get this right as the DB admin usually reviews statistics logged by the system and can notice
such anomalies in the DB.
 

MOCOMD1

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Where should the ignition sense connected to be "hooked up properly"? Any ACC connection? (IE: 12v lighter socket)
 

fineshot1

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Where should the ignition sense connected to be "hooked up properly"? Any ACC connection? (IE: 12v lighter socket)

Any point in the fuse box that supplies 12V when the ignition is turned on.

I use the pig tail fuse tap kits from tessco

The ignition line that goes to the radio should be properly fused - i think moto
includes a 3 or 4 amp ignition fuse kit with the radio.
 
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