Radio antenna ground question
#1
Radio antenna ground question
I have an aftermarket radio installed in place of the basic OEM stock radio. AM reception is crap with the antenna mast on and better with it off but the FM reception is then crap. The resistance is high when I checked the ground side of the antenna wire at the radio. I'm thinking the antenna is not grounded well. How is it grounded? I don't see a ground wire in photos on the web. Does it just ground via the bolt that clamps it to the roof?
#3
Hmmm. If that's the case, I wonder if the radio itself has a poor ground. It's currently grounded through the harness wire. I read resistance should test out at less than 2 ohms. Maybe I should see if I can ground the radio case with a jumper wire. There is also a grounding prong projecting from coax adapter cable (need that when installing an after market radio) maybe that's where I'll start. Thanks.
#5
I believe it is. That's why there is a power line coming out of the base. I know a lot of antennas are grounded where they clamp onto the sheet metal. I was wondering if that was my issue. Maybe there is corrosion where it clamps on. I've going off of this https://www.installdr.com/TechDocs/999801.pdf