Question about Magellan RoadMate 700 GPS Receiver

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No power to unit, but powers on okay in house with AC power adapter

So obviously it's the cigarette lighter adapter cable. But the cable has not been abused at all. The green light on the cigarette lighter adapter cable indicates that it is plugged in. Could it be a fuse if this light is on? The unit stopped working while plugged into my husband's old work vehicle. Ironically, when he plugged his iPod into the cigarette lighter, a fuse blew in that cable. And, we borrowed a Garmin GPS this weekend and plugged it into this same vehicle, and it worked fine for a while. But then it stopped working. It ran off of battery power for a while, so I know it must be either the cradle or the cigarette lighter adapter cradle. But I need to find out quick! So is it possible that the fuse is blown and that green light is still on? And on my Magellan, I thought it was the cradle, because when it first started acting up, it would turn off, but then I would play with it a little bit, and it would turn back on. Now it won't turn on at all. That doesn't sound like a fuse, does it?

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Re: No power to unit, but powers on okay in house with AC...

Not sure if you'll see this post, as you asked the question back in Nov, but I
thought I'd tell you what I know anyway.

I and my parents bought the same exact unit within a week of each other.
There's works, and mine does not.

I took their cradle, and hooked it to my GPS, and it came on, no problem.
I took my cradle, and hooked it to theirs, and boom, nothing.

So, with that, I was able to isolate that the problem is definitely in the cradle.

I went to the manufacturer website, registered my Magellan Roadmate 700,
and then I was able to contact customer support. I am writing to you as
I wait for their reply. Here's their website.

Hope this helps!

Posted on Feb 26, 2008

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Hello kdiltzbook,

Most GPS units can be charged three different ways:

1. Connection to a computer via USB port
2. Connection to a automobile via cigarette lighter plug
3. Connection to a wall outlet via an AC adapter

Typically most GPS devices these days include only the USB cord. Some GPS units also include the cigarette lighter plug. For most GPS units the cigarette lighter plug and AC adapter are optional accessories have to be purchased in addition to the GPS.

You don't mention which model of Magellan GPS you have so I am not sure which cords your GPS should have included. It sounds like you have the cigarette lighter cord and the USB cord? I am sure that Magellan has an AC adapter available for your GPS. You will want to contact them directly (their website is or visit an electronics store that sells Magellan GPS receivers (such as Best Buy™) to purchase the adapter.

However, most GPS receivers can be charged from the USB programming cord on the computer. However, ensure you are plugging the cord directly into a USB 2.0 on the computer itself NOT a port on a USB hub. (A USB hub may not output enough power to actually power and charge the GPS.)

You will also want to check and replace the fuse on the automobile plug.

I believe that both the USB and automobile cords should be charging the GPS. If neither adapter is charging the unit then the problem may be the GPS unit itself. The GPS may have a bad battery or problem with its charge circuitry. If that’s the case the unit may require factory service as the battery pack is generally not considered to be end user replaceable.

Best Regards,
"Go Ahead. Use Us."

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Karen died

If the unit works on battery but not the AC adapter or cigarette lighter adapter, obviously the problem is in the adapter.

1. Have you verified that you have +12VDC at your accessory jack?

2. Have you checked the fuse in the cigarette adapter?

What are you powering it with when not on the battery?

- Jim

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