Question about Garmin Nuvi 660 GPS Receiver
Hello , after purchase and mounting the nuvi 660 I would like to hard wire the unit into my truck so that it is not powered by the cigarette lighter plug in deal
should I cut the end off this power cord and strip it back a little and find a fuse proteceted power source? or is there another part that I can get so that when I take this unit to another vehicle I have a power cord??
The input voltage 12vdc for the cigarette is correct, but many of the adapters have a stepdown voltage to 5vdc built into the adapter. So before cutting the adapter verify that it is still 12vdc coming out at the other end, otherwise you could toast your Nuvi.
My nuvi 350 uses a mini USB plug and I know for sure that the voltage is stepdown from 12vdc to 5vdc.
Posted on Feb 14, 2008
Yes, you can do what you said above. The only issue I see is that you should still add an inline fuse between the GPS and the power source you will be connecting it to.** SEE NOTE BELOW **
The cigarette lighter plug has a fuse in it. Most of the fuses you have in the car start at 5 Amps and go up in value, like 10A, 20A, etc.
The problem is these values are way too high should the GPS have a catastrophic failure or the GPS power leads get pinched or shorted to ground. You'll burn up the GPS and its wiring before the auto fuse blows.
You need a low rated fuse (probably 1/4A) inline with the GPS. This will give you adequate protection. You can buy inline fuse cords at Radio Shack.
** NOTE **
Check to make sure that the DC output of the cigarette adapter is indeed +12VDC and not some lower voltage indicating that there is an internal regulator circuit. I took a look at the 660 owners manual and it says the GPS input voltage is +12VDC, so you should be ok. I also hear there is some electronics inside of the cigarette lighter plug. It may have to do with charging the internal GPS battery. You could always take apart the cigarette plug and remove the internal board and use it in your hard wiring to your vehicle.
Once you get it all working, you could duplicate what you built for another vehicle. You can buy the cigarette adapters online.
Please let me know if I can be of further assistance to you.
Posted on Feb 13, 2008
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Posted on Jan 02, 2017
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