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Amp blows fuse when radio is keyed up - Radio Communications

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Whether it is the external or internal amp you may have to much power going through it.Could be a number of things from your finals to the reverse polarity diode.Check it out with the cover off and I'm sure you will find the problem.

Posted on Jan 15, 2014

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Amp fuse 30a keep blowing


You have possibly melted a couple of wires together along the radio circuit. Also the radio unit itself has 1 or more protection fuses actually inside the unit that have blown, usually at back of unit in little bay near the wire clusters.
Check your relays too, a blow out through jump starting can do all sorts of little burn-outs.

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I have a connex 4300hp . I have power until i key up ,then it blows the fuse . What size fuse does this require ?


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1 Answer

It keeps blowing my fuse for my stock radio. Pushing a 10" sub.. Fuse on my amp is good. In-line fuse is good. But it keeps blowing the radio fuse in my panel.. ? Please help.. Thanks Ryan


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Gen lee blowing fuses when keying


What size fuse are you using? If you have a different power cord than that which came with the radio, such as one from a regular cb radio like a cobra 29, it will only have a 2.5a to 3a fuse, which will blow everytime you key up, since it is pulling to many amps. You need to have at least a 7.5a to 10a fuse. I use 7.5 amp fuses, because I have a 100 count box, and have no problems. The Stryker radio I have in front of me has a 10a fuse in its power cord from the factory, though the cord on my bench only has a 7.5a and has not blown.

If your radio still blows fuses after this, please let me know. You can message me here or email me at rollincbmods@yahoo.com.


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1 Answer

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Sound like: 1. Are you using the correct fuse rating?? 2. Are you supplying the correct voltage?? 3. You probably have final amp problems.. get an expert.

Feb 10, 2008 | Radio Communications

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