CB radio problem

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If it were me, I'd measure the current that the cb is drawing, and the current already going through that fuse without the cb.

It could just be that you've got too much wired to that fuse already, or that your cb is broken or wired incorrectly causing it to draw too much.

If it's that you've got too many things off the same fuse, put in an additional fuse.
 
Is it the fuse for the cig lighter? My cb is wired direct and only have a 2 amp glass inline fuse. Never popped on me yet.
 
It has a fuse in the cig lighter! Maybe it's the cig lighter playing up! I've tried other fuses as I said and it won't light up! Unless my cb is playing up
 
It's drawing over 15 amps, which is over 180watts, Have you got a big external speaker? :rofl: :D
 
Get it wired in direct. They draw so little from the battery you don't need to worry about it draining it.
 
Im running a setup from thunderpole and put in 2 inline fuses direct to battery. Book says peak use is 2amps. Longest i've left my disco is a couple of weeks with no probs.
 
Really! See I always had issues with draining! Need to look into this


Might be that the CB itself has an issue then. I would pop it into a local garage and get them to check current draw, I would offer my services but my place is down in harwich so a good 40 miles away...
 
STOP TRYING BIGGER FUSES NOW ... 2 AMPS IS MORE THAN ENOUGH

All cb's have a reverse current protection diode fitted into them. This diode will allow power to flow through it and blow the fuse if the rig is inadvertantly wired the wrong way round. Once the diode has gone short circuit, it will blow any fuse in the power supply line.

Sadly, when this has happened, the audio amplifier ic usually gets damaged. I would say that by increasing the value of the fuses you have used will most certainly have caused at least the audio amp to die.

You have one slight possible chance that the short is in the cable, or connector in the back of the rig. Otherwise, you are looking at a repair which could be anything from a few pence (diode) to a few pounds (diode & audio amp) to a wrecked rig not worth repairing.

For a number of years, if I was asked to repair a rig which had been damaged by reverse polarity, I would wire in a small bridge rectifier in place of the diode. This would protect the rig from any accidental reverse polarity in it's future life and cost only a few pence extra. Particularly useful if I was lending any rigs to anyone who might get it wrong way round.


The fact that your rig is blowing fuses MIGHT mean that the diode is still short circuit (very unlikely,) if you are very very lucky this short will be protecting the rest of the unit, but if you finally blow it by increasing the rating of your fuses and it goes open circuit, then the power applied will be going through the rig and if you have it on the wrong polarity then your rig will have suffered considerable damage.
 
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I think this is a job for the experts lads! I am going to get a mate to help out he doesnt live far and has a fair more of an idea then i will ever have! Thankyou for all your replys etc i reckon it might be the actual fused plug itself as the cig light plug doesnt light up at all!
 
I think this is a job for the experts lads! I am going to get a mate to help out he doesnt live far and has a fair more of an idea then i will ever have! Thankyou for all your replys etc i reckon it might be the actual fused plug itself as the cig light plug doesnt light up at all!

Ahh, I thought I'd read the fuse blew when you switched the rig on. My bad.
 
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