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Unread 11-17-2009, 03:27 PM   #1
07 Elephant
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Default replace stock 115v transformer

I have the interior apart for running wires and I noticed that the 115v transformer is in the back driver side right above the wheel well. I didn't know where it was and I haven't looked for it. It's nice to have the a/c plug in the center console for a set of motorola walk abouts and a few other low draw things. I'd like to add a larger one though for other stuff. I'm not sure what because most of my stuff is 12v anyway. But I could find uses.

My question is....can I replace the stock 115v transformer for a lager marine grade one? There is plenty of room and I'd run a fan to keep it cool. What's the impact on the stock wire harness? Anything else I should think about in doing this?
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Unread 11-17-2009, 05:37 PM   #2
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Not sure if the stock wiring harness is up for more than the current 100W unit, especially the 12V side. Maybe if you run thicker cables on the 12V side from the battery and use the existing 12Vwiring just to drive a relay it might be useful for more power.
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Unread 11-17-2009, 07:22 PM   #3
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Ya know, I was wondering this same thing. My thought was to replace it with the FJ unit. I believe it is at least 400w. Not a lot more, but still more. I thought the Tacoma came with the 400w unit as well? Maybe a worthwhile replacement that could fit in the same location.

Not sure if it is within the same range of what your looking for, but figured I would toss it in there.
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Unread 11-17-2009, 07:34 PM   #4
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The 100W unit has an amperage of about 9 amps at 12V DC, the 400W unit is about 34 amps at 12V DC. The wires are most likely 14 gauge (I'm guessing, I have not torn mine apart yet please check labeling on cover) which will handle the extra current. If it's thin control wire, it will need to be upgraded.
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Unread 11-17-2009, 07:43 PM   #5
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Quote:
Originally Posted by bulldog View Post
Not sure if the stock wiring harness is up for more than the current 100W unit, especially the 12V side. Maybe if you run thicker cables on the 12V side from the battery and use the existing 12Vwiring just to drive a relay it might be useful for more power.
Good catch on the feed wires. They're at most 18g. So not beefy enough to carry much more than the 100w. I'll just add larger one later and leave the stock setup the way it is.
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