Midland 70-1340b Ground issue?

Forum dedicated to discussion on Midland Radio products. (Questions/Instructions about modifing CB radios are prohibited)
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Joined: Thu Mar 15, 2012 2:27 pm

Midland 70-1340b Ground issue?

Post by trophyxl » Thu Mar 15, 2012 2:35 pm


I'm trying to fix my friends Midland 70-1340b. Its powered by a cigarette adapter so the neg(-) from the lighter adapter goes to pin 7 of the plug and the positive goes to pin 9. The problem (or might just be normal operation but i dont think so) is that the radio will only power on if its grounded to the chassis of the truck. (i.e in its mounting bracket thats mounted with tapping screws to the metal floor boards). Is it normal to have to ground the housing of the radio? Any help would be greatly appreciated.

Thanks in advance

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Re: Midland 70-1340b Ground issue?

Post by ka7wnf » Wed Mar 21, 2012 10:27 pm

Sounds like the ground path is making it from the cig lighter plug into the radio. Can you open it up and use an ohmeter to check the ground path?

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