NX-5K Mobiles Rebooting

[AF1UD]

Hey all! Up in New England here it's been very cold the last couple days. My 2 deck one head NX5Ks and harris xg-100m radios are bolted under my trunk and when it's cold they continuously reboot until the car gets warm. The harris ones are ok and never have a problem rebooting.

This happened the last time it snowed and was very cold outside. I also found that the molex power connectors on the whip from the nx-5700k deck was loose and secured it.

Has anyone had problems with these in the cold or other power related problems? I haven't had this happen in any previous cars these were installed on.

 

[tweiss3]

How cold are we talking? It was -4F this morning, and when I grabbed things out of the truck, the radio came on, but the remote start did warm things up.

 

[AF1UD]

9-10 degrees F

 

[kb4mdz]

Check your DC Voltage at the radio; if you've got a tenuous connection, and your battery is weak due to cold (or other high current load) you maybe have too much voltage drop between battery and radio.

Once saw a cop car with a marginal battery, showed 10.8V awith engine off, not very better with engine at idle. Keying a 100W radio made to radio + voltage drop too low and reset.

 

[buddrousa]

You might have a component out of tolerance or a bad solder joint.
The operating temperature range for the Kenwood NX-5700 mobile radio is -22°F to +140°F (-30°C to +60°C).
This temperature range is consistent for both the North American and European (NX-5700E) models, as confirmed by official specifications.
Key Environmental & Physical Specs:

• Operating Temperature: -22°F to +140°F (-30°C to +60°C)
• IP Standard: IP54/55 (Dust & Water Protection)
• Military Standard: MIL-STD-810 C/D/E/F/G

 

[AF1UD]

Thanks guys! After more research and measuring with multimeter... it was indeed a voltage problem. My Ford Explorer 2025 usually sits at or around 12v when the car is off, I'm thinking the battery is going bad. Car is still under warranty, following up on getting the dealer out to battery test it.