Wiring - New trailer has brakes!!

(also posted in other RV related NGs, and settling down at the campfire to 
discuss this with you folks, if you please)

Hi folks,
I tow with a 98 Toyota Sienna, and have been pulling a Coleman/Fleetwood 
Destiny Rio Grande for some years now with a 4 prong plug (no brakes) and 
everything has been fine.  During our last trip in September someone 
rear-ended us and totaled our beloved popup.  So now we have bought a really 
nice used 1998 Coachmen Clipper and it has *brakes*.  This is the new ground 
for me and if you can help me understand things I will greatly appreciate 
it.

So the previous owner has a Prodigy controller and liked/recommended it and 
from what I have read around the net I have pretty much decided that this is 
what I will be needing.  No problem there and I know where to get one.  My 
question for you folks is what to do about wiring.

What I have now is a 4 prong wire that disappears into a hatch on the rear 
interior passenger side of the wayback of the Sienna.  I pull out the wire 
when I need it and stash it back in there when I am done.  There is no 
exterior mounted plug of any manner - I just close the wayback door on the 
wire that sticks out.  This was installed by the folks who installed my 
hitch (meaning not me).  The new Coachmen has a 7 prong round plug.  I also 
have another utility trailer so I will be also needing to retain 4 prong 
capability for that.

So now I am faced with replacing the wiring with a system that will support 
the 7 and 4 prong trailer systems I will be using, and also wiring in the 
Prodigy, once I get it.  I am a pretty handy guy (I replaced my disc brakes 
and rotors recently - no problem - as a benchmark), but I have not done this 
particular stuff before.  I am supposing that I can open up that panel and 
see where the existing wires go and 'do the stuff'.  I just do not know what 
that stuff is, exactly.

Is this something I can do on my own or should I just pay someone about $300 
[cringe] to sell me a controller and do it right?  If I can do this what do 
I do?

Thanks Folks,
Tomes 


.

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