View Full Version : Battery or Frame ????

03-26-2012, 09:00 PM
What is your opinion?

Ground the radio to the frame or straight to the Battery???

Running Connex 4300/300 and Ranger 2970 N2

2010 Chevy PU


High Voltage Mobile NJ
03-26-2012, 09:16 PM
the Battery is ok because its a very short run and the radio doesn't pull really any current more than a couple of amps.
in your case you will pulling more amps than 2 or 3 amps.
your radio probably draws around 40 amps max .

if you run into noise or rf issues the shortest ground is the very best . about 3 feet away from the radio to the steel frame . you be alright . :have a nice day:

03-27-2012, 08:03 AM
I might have to try putting mine to the frame. I have some engine noise coming in through the power cord and have tried everything I can think of short of a noise suppressor. I have the radio case grounded to the frame as well and that did cut down on it some but it still has a whine in it.

03-27-2012, 05:10 PM
I think I will go back to the frame. Have tried both and there seems to be more "noise" with the ground connected to the battery.

Thanks for the replies......

03-27-2012, 08:50 PM
THE BODY. the radio doesnt tx off the battery or frame. it transmits off the body of the vehicle

03-27-2012, 09:02 PM
Ok so what your saying is take the shortest route to the body of the truck then.

03-28-2012, 07:22 AM
you can add some filter caps to ground inside the radio at the power plug but it may not help if the noise is coming through the antenna

03-28-2012, 07:53 AM
Mine isnt coming in through the antenna. I have determined that already it is coming in through the power cord.

03-28-2012, 11:28 AM
what noise are you getting. whine, tick, buzz?

you need a power line filter and or a cap of decent size close to the radio

03-28-2012, 11:56 AM
It is a whine that changes with RPM.

03-28-2012, 04:30 PM
Mine is a whine that changes with RPM too. Both radios cases are grounded too. I can cut about 3 ft. of ground off if I go back to the frame. It seems like there was less noise when connected to the frame before.

555 BigHorn
03-28-2012, 07:09 PM
what kind of vehicle is this on?
what kind of coax are you running and antenna running?

when i hook up a radio i run both pos and neg to the battery
that way the radio is not trying to find a good ground thru the dash mount then thru the firewall and thru the little strips of bonding

and then i run a flat strap from the radio to the frame and not a seatbolt

since the radio requires both a pos and neg then i give it the best source possible and im pretty sure its going to run thru a copper negative wire better than running back thru the dash and where ever else

also with the amps i install
i hook a pos and neg to the battery or batteries
and at the bolt on the back of the case i run a cable or large flat ground strap directly thru the bed to the frame

run a ground cable from bolt holding alternator and run to the neg post on battery then a cable from there to the frame

03-28-2012, 08:22 PM
Mine is a 2010 Chevy PU.
I have 6 ga. copper wire from Pos. post on Battery to radios and 8ga from Neg. post on Battery. Both radios have a ground at the back of the case to a ground that goes to frame.

It could be that I am just spoiled from driving a diesel PU back in the 80's and there being NO whine or motor noise that came thru the radio.

It isn't terrible, but just bugs the piss out of me.
Radios are performing great. Just don't like the whine. It seems louder under 10 mph and then fades away as I speed up. Really can't hear it at hwy speed, just don't know if it is overshadowed by road noise.

03-28-2012, 08:48 PM
you will never get that fully out. there is a leaky diode. you will need both the cap and power filter.

04-10-2012, 08:46 AM
Or a big ass ferrite on the hot line of the alternator that feeds power to the vehicle. Trick we used to do back in the day with whine in the stereo sustems is ground the alternator case to the motor. It might fix it, it might not. Try it- minght be as simple as that.

04-10-2012, 08:47 AM
I meant ground alt case and neg batt to one point on the motor. Sorry too much coffee and iphone keyboard. Lol