How to wire a car radio directly to the battery

marko1100

Hoping this is the right place to post this . Looking for advice on how to wire a car radio directly to the battery .

Any help would be appreciated

Thanks

shooter88

Bring wires directly from battery and fit a fuse

tossy

Why would be the obvious response most people would have.

Cee-Jay-Cee

Why would you want to do that? There are plenty of auxiliary wires within the car to power a stereo.

CiniO

CJC999 wrote: »

Why would you want to do that? There are plenty of auxiliary wires within the car to power a stereo.

Maybe his stereo needs more power than those wires are capable of.

iamthemanwork

Maybe he just wants to wire a radio to a battery . Many people have this type of set up in workshops etc.
Normal run is Red and Yellow to + of battery
Blacl to the --- ( negative ) of battery.
Be sure to fuse the + supplies.

marko1100

want to wire it to battery because for some reason the radio is draining the battery with the standard fitting that goes into the back of the radio . so i figured if i bypass all that and just run wires straight from radio to battery it would sort it.

iamthemanwork

If radio is draining battery while it is in the car it will still drain it if wired directly off the battery. Most likely there is a fault in the radio. What make of car / radio do you have.

marko1100

Fiat Bravo . and just the standard radio that came with it not a clue what make it is . Have changed the fuse and that didn't do anything . it's only been recently though . for years it has worked fine until one day it wouldn't start . Took the fuse after a few days and it started fine so got a new fuse and back to the same problem.

colm_mcm

Current bravo or the 90s one?

marko1100

99 sorry

iamthemanwork

If this radio is a cassette type where a door flips up so as to allow the tape in then you definitely have a fault in the radio and it is repairable.

Voodoomelon

Most Fiats from the 90s had blaupunkt radios did they not? I remember the Puntos used to have drain issues with these headunits.

colm_mcm

Voodoomelon wrote: »

Most Fiats from the 90s had blaupunkt radios did they not? I remember the Puntos used to have drain issues with these headunits.

My 99 was grundig.


(Built in, with the cool flip up lid for the tape!)

marko1100

iamthemanwork wrote: »

If this radio is a cassette type where a door flips up so as to allow the tape in then you definitely have a fault in the radio and it is repairable.

yep thats the one . any idea on what the problem would be ? to be honest i'm probably going to get another radio for it that an play cd's and has an aux socket on it . should it just be a straight swap then ?

marko1100

ye not sure on make but it had the flip up door for tape's

colm_mcm

marko1100 wrote: »

yep thats the one . any idea on what the problem would be ? to be honest i'm probably going to get another radio for it that an play cd's and has an aux socket on it . should it just be a straight swap then ?

Yep, you just need a din adaptor plate and a loom adaptor. The fiat genuine one doesn't fit properly for some reason though.

Cogsy88

Theirs either a fault wit the radio or somebody was messing around with it before. Check that the permanent supply isn't mixed up with the switched supply. If it is, the radio will stay on when the keys are removed from the ignition and drain your battery.

marko1100

thanks for all the reply's . ill be getting a new radio tomorrow most likely so hopefully that will fix it it now i'll be back on here lol .

Thanks

iamthemanwork

The draining of battery is a common fault in this model stereo --AD185. There is no problem to repair it but I would be biting my hand if I gave away the solution... a knowledge of Electronics is needed. If you decide to replace you will be in need of an adaptor face.

marko1100

whats an adaptor face ? like a covering to go around the from of it to fill in the gap from the front of of the old if that makes sence ?

CiniO

Before getting a new radio I would actually properly diagnose the problem.

This device will do the job for you

coylemj

colm_mcm wrote: »

My 99 was grundig.


(Built in, with the cool flip up lid for the tape!)

+1 I was told my 96 was Grundig, the boot was wired for a CD jukebox (user supplied).

Damn good radio, even supported RDS EON (enhanced other networks) so you could be listening to a tape and it would pause when a traffic report was being broadcast.

iamthemanwork

CiniO wrote: »

Before getting a new radio I would actually properly diagnose the problem.

This device will do the job for you

Unless you know how to use a multi meter and know where to look , there is no point in having one . I carry out repairs on a daily basis but my meters dont tell me where the fault is located.

CiniO

iamthemanwork wrote: »

Unless you know how to use a multi meter and know where to look , there is no point in having one . I carry out repairs on a daily basis but my meters dont tell me where the fault is located.

It's not exactly rocket science.

Multimeter comes with two wires (red and black)
Plug in red wire to 10A socket, and black one to COM on multimetre.
Put it into 10A mode.
Unplug your batter connection (preferebly -). And put the multimetre in serial link to there (black multimeter wire to the batery minus, and red multimeter wire to the battery connection wire you just unplugged.
Then multimetre will tell you exactly how many Ampers is being drained.
You can fiddle with radio and see if uplugging and plugging is again makes any difference. (maybe fault is not in the radio but in the socket or wires).

Once OP is sure it's the radio (when plugged in it's draining the electricy while if unplugged it isn't) then he can start thinking about solving the problem by getting new radio.

iamthemanwork

CiniO wrote: »

It's not exactly rocket science.

Plug in red wire to 10A socket, and black one to COM on multimetre.
Put it into 10A mode.
Unplug your batter connection (preferebly -). And put the multimetre in serial link to there (black multimeter wire to the batery minus, and red multimeter wire to the battery connection wire you just unplugged.
Then multimetre will tell you exactly how many Ampers is being drained.
You can filled with radio and see if uplugging and plugging is again makes any difference. (maybe fault is not in the radio but in the socket or wires).

Once OP is sure it's the radio (when plugged in it's draining the electricy while if unplugged it isn't) then he can start thinking about solving the problem by getting new radio.

I follow all you are saying, as I am doing electronic repairs for the past 40 years, but I doubt Marko1100 would be able to do that since his original question was on how to wire a radio directly to a battery.