WAIT!!!!! What is suggested before might be perfect for the TomTom, but if you're like me, you'll try to apply this thread to something else, be it an XM or Sirius tuner or another Nav Unit or Radar Detector....
I made the mistake of cutting the wire for my friend's Sirius tuner, and then realized that the voltage at the unit was something like 8 volts, NOT 12 V... Apparently, the male end of the cord (the part that goes into the cigarette lighter socket), had a transformer or something to step down the voltage. So, I had to splice the cut wire back together and was left with 2 options.
1. Buy a cigarette adapter (a female end with some wires) and hard wire the adapter.
2. Cannibalize the male end, find the "transformer" and wire appropriately.
So, my warning is this: Make sure that your device requires 12V at the device, and that there isn't some "changing" device in the plug or wiring that would require you to do the above mod!
Happy Modding!
__________________
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I made the mistake of cutting the wire for my friend's Sirius tuner, and then realized that the voltage at the unit was something like 8 volts, NOT 12 V...
Good point. Wiring a unit's power cord directly to a fused connection is done with the assumption that the unit requires a full 12 volts, rather than being stepped down by a transformer built into the supplied cigarette lighter plug.
Check the voltage requirements first, and go with VooDude's above suggestion of putting a female cigarette lighter receptacle in-line if the power needs are less than 12 volts.
Also, some GPS units' power cords (i.e., Garmin) have multiple wires that use two out of 4 -5 wires to feed the power to the unit (+ and -). The remaining wires may be for computer connections. Know which wires you're tapping into.
WAIT!!!!! What is suggested before might be perfect for the TomTom, but if you're like me, you'll try to apply this thread to something else, be it an XM or Sirius tuner or another Nav Unit or Radar Detector....
I made the mistake of cutting the wire for my friend's Sirius tuner, and then realized that the voltage at the unit was something like 8 volts, NOT 12 V... Apparently, the male end of the cord (the part that goes into the cigarette lighter socket), had a transformer or something to step down the voltage. So, I had to splice the cut wire back together and was left with 2 options.
1. Buy a cigarette adapter (a female end with some wires) and hard wire the adapter.
2. Cannibalize the male end, find the "transformer" and wire appropriately.
So, my warning is this: Make sure that your device requires 12V at the device, and that there isn't some "changing" device in the plug or wiring that would require you to do the above mod!
Happy Modding!
THANK YOU! I just noticed my TOMTOM is the portable version and output from the lighter is 5v/2a. Now I am depressed. I was so psyched to be able to hardwired my tomtom. My add a circuit is ordered and in the mail... For options 1 and 2 do you think a novice could handle wiring that up? Thanks
Steve 2 dummy questions. i got an add a fuse to hook up my CB. which of 2 slots do i put the fuse into? and also the fuse does not want to go in past the wedge on the prong. is it supposed to go hard and how do i get it in? flame away.
EDIT Nevermind, i figured it out
So what did you figure out? I have the same question. Just bought one of these add-a-circuit thingys to power the switch for my winch power inturrupt kit. The switch worked fine when I just crammed the bare wire into an empty switched fuse recepticle...but now that I wired it with the add-a-circuit...nothing...do you have to have a fuse plugged into the side of the add-a-circuit? Is it a special fuse or just the same as the others? ....and which set of holes do you put the fuse in (there are two sets) if you do need one? THANKS!
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So what did you figure out? I have the same question. Just bought one of these add-a-circuit thingys to power the switch for my winch power inturrupt kit. The switch worked fine when I just crammed the bare wire into an empty switched fuse recepticle...but now that I wired it with the add-a-circuit...nothing...do you have to have a fuse plugged into the side of the add-a-circuit? Is it a special fuse or just the same as the others? ....and which set of holes do you put the fuse in (there are two sets) if you do need one? THANKS!
The fuse slot on the Add-A-Circuit closest to the prongs is for the original fuse whose OEM slot that you'll be using as a shared circuit. (i.e., stock radio, heater, 12V AUX power outlet, etc.)
The fuse slot furthest away from the prongs on the Add-A-Circuit is for the added component (CB, GPS, satellite radio, etc.) that you're adding to the existing circuit.
EDIT: BTW, be sure that your "added" fuse conforms with the amperage rating requirement of your added component . . . . which may not be the same fuse rating as the OEM fuse that you're supplementing.)
Re: Hardwired Cobra, TomTom One LE
Linear Mode
