wiring

me4x4 · Apr 18, 2009

hi can i wire my midland 98cb into my interior light and power it from here or have i got to wire it into its own fuse i dont use the light

shadowster · Apr 18, 2009

aye you can do it but it will only work when the door is open

me4x4 · Apr 18, 2009

he he he

iannotts · Apr 18, 2009

shadowster said:
aye you can do it but it will only work when the door is open

You sure????

think you need to go and have a look at the wiring diagram:doh:

you will find they are switched on the earth

me4x4 · Apr 18, 2009

so i take it the wiring is up to a cb running off it?

The Mad Hat Man · Apr 18, 2009

put a separate fuse in it and make sure it is earthed separately. It will, of course be permanently live - so remember to turn it off - or else flat battery.

MartinBird · Apr 19, 2009

Sorry to disagree here.............

I personally would run a new fused live supply, i wouldn't use the supply to the interior light, i doubt the wire size is current rated to run the higher draw from the CB.

Find a good earthing point on the body and use that as your negative that way your only running one new wire.

Its not a big job and its best to be safe than sorry!!!

me4x4 · Apr 19, 2009

cheers martin bird was looking for lazy way but thought bugger it will try do it properly not great with stuff like this so thought would ask,i have a midland 98 plus two wires at the back one is red so must be the live the other is neutral or earth but dont know which

The Mad Hat Man · Apr 19, 2009

If its a disco - check in the side of the drivers footwell - yu mite find a couple of spare relays that arent being used - if any of them go live with the ignition - yu can take a spur orf from that....

iannotts · Apr 19, 2009

tbh daft i would have thought it would be ok on the interior light circuit,
surley a std cb dont take that much power.

me4x4 · Apr 19, 2009

yeah its a disco 300tdi

The Mad Hat Man · Apr 19, 2009

i think yu are correct - but offhand dont know wot fuse the interior light has - check it first - if its 5A or so - shud be ok - but still fuse the CB separately. One thing tho - as I mentioned before - the good (and bad) bit about using the interior light circuit is that it is PERMANENTLY live - good thing - coz otherwise your CB will reset to its default channel every time you turn it off - bad thing - coz you wouldn't be the first to leave it on and drain the battery. ALWAYS separately fuse the CB - 3A? fuse.

me4x4 · Apr 19, 2009

like i say dont know very much bout electrically stuff ,the wires at back of cb obviousley red is live what is the black and red one and the light its self thats live on both terminals innit.so if i put a fused cable onto either light connection and put the black and red wire to the body work will it do it still might tek it down to the driver footwell etc which is easiest for a dumb ass like me

MartinBird · Apr 19, 2009

me4x4 said:
like i say dont know very much bout electrically stuff ,the wires at back of cb obviousley red is live what is the black and red one and the light its self thats live on both terminals innit.so if i put a fused cable onto either light connection and put the black and red wire to the body work will it do it still might tek it down to the driver footwell etc which is easiest for a dumb ass like me

Right mate, ignore me and use the interior light wiring, it should take the 4amp max that the CB is gonna pull, its just not the way i would do it.............

Enough of that here's some answers.......

The interior light will have a permanent live feed to it! Find it with a test lamp or multimeter.

You will need to pick up a decent earth from the bodywork, one of the interior light mounting screw's if their to metal should be ok if they are to the plastic shelf then there no good. The switch may have permantly one position the earth pick up point for this will do the trick.

As for the black and red wire.........

Does t not say on the CB or in the instructions............

It could be memory back up, ignition supply, dimming with headlamps on........

I just dont know you may have to look up the maker.........

Hope this helps

me4x4 · Apr 19, 2009

cheers mate big help that,got it second hand will have look on internet to see what the black and reds for i know it will blow my mind but just out of interest how would you do it ive mounted the unit up on the plastic where the sunroof controls should be no sunroofs so nice neat tidy job up there

Mr_V · Apr 19, 2009

I have mine connected there and have had no probs. Obviously separately fused.

MartinBird · Apr 20, 2009

me4x4 said:
cheers mate big help that,got it second hand will have look on internet to see what the black and reds for i know it will blow my mind but just out of interest how would you do it ive mounted the unit up on the plastic where the sunroof controls should be no sunroofs so nice neat tidy job up there

I would just run a new supply thats all i ment......

Good luck anyways!!!!

Dave 2000 · Apr 20, 2009

I googled your CB and it came back with 1.1 amps! As already pointed out, the interior light supply will be OK however, as also pointed out the radio could be left on by mistake.

I have heard of a mini cab driver having his car trashed because he kept someone up all night after leaving his two way on.............food for thought?

regards

Dave

battenberg · Apr 20, 2009

i got mine spurred of the interior light on my 300, there is an earth point behind the light in the roof, fidley but not impossible to get to.
Ariel cable can be run in the roof inside the roof lining to the A pillar easy enough to thread trough without having to drop the headlining.

me4x4 · Apr 21, 2009

cheers guys thanks alot

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