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Thread: Im getting noise Interference from my radio (Whiring sound with engine)

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Posts: 21-23 of 23
2012-08-08 00:56:40
Originally Posted by SE-RMonkey
I have great reception and no noise until I turn the key one click forward to "run". As soon as one of the relays down by the ECU click the reception shit's the bed, turn the key back and when the relay de-energizes the reception comes back. I wouldn't call it electrical interference either, it's more like a "carrier" signal "stepping on" my reception.

Definitely not the fuel pump, I pulled the relay and the fuse and it's still there. Car has a JWT upgraded ECU. Maybe something to do with that?

Just thought of something. May have something to do with the alarm. I'll check that next.

"I am aware that this thread is rather old but I still want to make a reply."

I recently had to install a new battery as the 8 year old Interstate suddenly dropped dead. Today I noticed my interference issue is 90+% gone. I had suspected from the begining it was a ground issue, but this has me stumped. I've had the battery cables off a couple times and I keep them spotless, so the only thing that has changed is the battery itself. I've never heard of a battery causing interference, so maybe I disturbed the ground cable if that's where the issue was/is?

It still persists a little so I may try a nice, new battery ground cable.
2012-08-10 07:44:53
Nissan radios usually rely on being grounded thru their metal mounting brackets, which is why there isn't a ground in the harness plug. Most people don't realize that, so when they have the radio antenna plugged in, it works. that's usually a good way to get interference. I reused the factory brackets and added a ground to the harness.
2012-08-10 12:44:28
I always run a ground from the ground lug on the aftermarket radio to the console framing for this reason. It is really important to get solid grounds for the reason that Josh stated above.

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