Single LED power consumption

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tom1979

tom1979

Well-Known Member
Full Member
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Location
East of England, UK
Well today’s project went well, then I realised the USB sockets have an LED permanently lit! Can anyone tell me how to work out the power consumption for it? Wondering whether to put them on a switch or if it won’t be any worse than the immobiliser LED

8E34BC49-13F3-4BE0-B17B-991AC63B0749.jpeg F553C4C0-1864-4EE0-BC66-500F16FE9925.jpeg
 
Have similar USB/ ciggie lighters 6 of them in total...never worried about it and the landy starts after a few weeks of doing naff all, but it is a 300tdi so is proper like...LOL .

Cheers
 
neilly said:
Have similar USB/ ciggie lighters 5 of them in total...never worried about it and the landy starts after a few weeks of doing naff all, but it is a 300tdi so is proper like...LOL .

Cheers
Click to expand...

Lol, probably the only electronics on it! Cheers, you never know what these Chinese things do.
 
I had one of those annoying little lights on a switch for my spot lights, I was as worried as you! I ended up wiring the switch through the headunit signal cable just to be sure. So made it a switched live.
 
bankz5152 said:
I had one of those annoying little lights on a switch for my spot lights, I was as worried as you! I ended up wiring the switch through the headunit signal cable just to be sure. So made it a switched live.
Click to expand...

I thought about that and while everything’s still out from installing a flip out radio Bluetooth satnav thing I might well do it

1ADCCB2B-A3A6-4954-8302-F2E965956790.jpeg A53C5B63-152A-422A-B0EB-A62FAC4ED6EC.jpeg
 
bankz5152 said:
I had one of those annoying little lights on a switch for my spot lights, I was as worried as you! I ended up wiring the switch through the headunit signal cable just to be sure. So made it a switched live.
Click to expand...

I have done the same for my EGT readout, does mean I have to have the lights on to read the EGT tho...o_O

Leaving it perm live.Only real risk i see, is if you leave something plugged in , such as a CB for a few weeks.....................:oops::oops:

Cheers...
 
Thats why I said use the signal feed for the head unit, can wire that to a relay and so forth. Lil long winded and annoying I know. Though its exactly why I chose unlit 12vs, ive got 5 in my 110 all perm lives.
 
bankz5152 said:
Thats why I said use the signal feed for the head unit, can wire that to a relay and so forth. Lil long winded and annoying I know. Though its exactly why I chose unlit 12vs, ive got 5 in my 110 all perm lives.
Click to expand...

My cigar lighter powers itself, the radio aerial/GPS and two usbs between the rear wash and cigar lighter. The other stuff I’ve added is permanent live on a separate fuse box from the battery, things like the rear spots, beacon, interior lighting. All low power stuff (LED). While I’ve got everything hanging out I could sort out an ignition feed off the radio for the future. One thing that will definitely want it is the tracker which has been sat in its box for a year!
 
bankz5152 said:
Thats why I said use the signal feed for the head unit, can wire that to a relay and so forth. Lil long winded and annoying I know. Though its exactly why I chose unlit 12vs, ive got 5 in my 110 all perm lives.
Click to expand...

Yep, this is what I've done too, signal feed from head unit to a relay in the back that has a live feed direct from the battery. The only downside now is that I can't use the sockets in the back unless I have the head unit on, and I mean really on, not just power to it from ignition.

Considered changing the relay trigger to the ignition feed, but then I'll just be moaning that I have to have the keys in and turned to use the sockets...

So, I'm going to add in a 3 way switch that can be a relay override option.

Of course, at some point I'll leave it on and zap the battery overnight.
 
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