Midland MXT575 Vehicle Noise

[WSFU671]

I hooked up my new GMRS radio in my 2020 Sierra a few weeks ago. For the first week it was good, clear audio and communication. A few days ago I hopped on a local repeater net and it was nothing but static during receive (and transmission I found out.) I decided maybe it was my location at home, so I went to drive around. The static got worse, almost like a whirling static that matched the vehicle's speed. Only seemed to clear up when I was stopped or parked. I have the radio wired to the positive on the battery and a ground post on the frame. The antenna is the stock 1/4 wave antenna with mag mount that came with the radio. Any suggestions on clearing this up? I purchased ferrite clips on Amazon to see if that will help. I was wondering if I should maybe hook up the negative to the battery as well or maybe moving the antenna. It seems like it happened after it rained recently... Thank you in advance!

[WRYZ926]

Leave your radio connected as it is with the ground going to chassis. Otherwise you could interfere with the auto start/stop system and the battery management system if you connect it to the negative battery terminal.

It sounds like you might be getting noise from the alternator. I know I was getting noise from the alternator on my 2023 Ford Escape. I put clamp on ferrite beads on the leads to the radios and I put two more, one on each end, on the cable going between the alternator and battery. That helped clear things up for me.

[WSFU671]

4 hours ago, WRYZ926 said:

Leave your radio connected as it is with the ground going to chassis. Otherwise you could interfere with the auto start/stop system and the battery management system if you connect it to the negative battery terminal.

It sounds like you might be getting noise from the alternator. I know I was getting noise from the alternator on my 2023 Ford Escape. I put clamp on ferrite beads on the leads to the radios and I put two more, one on each end, on the cable going between the alternator and battery. That helped clear things up for me.

I did purchase a kit of the ferrite clamps on Amazon, has a few sizes in it. I will certainly give it a shot. 

[WRYZ926]

Make sure to use good quality electrical tape and tape up the clamp on ferrite beads so they don't fall off.