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Old 08-12-2016, 04:04 PM   #1
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Join Date: Aug 2016
Location: St Louis, MO
Posts: 7
Replacing a 4 pin trailer harness with a 7 blade and installing a power lift

Video Link

The power jack was a gift from a friend who works at a local RV Dealer. Watch the series of the repair and installation. This jack is a bit slow and i may just end up using the manual lift. I did want the power from the truck so that i could charge the battery when traveling.

Part 3

Reese Towpower 74127 Plastic 7-Way Flat Blade Trailer End Connector

FIC-3500-2 Electric Trailer a-frame jack
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Old 08-12-2016, 09:41 PM   #2
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Location: Lake Havasu City, AZ
Posts: 506
If it's slow like the motor dragging. It might perform better with a heavier gauge wire from the house battery to the jack. Then let the TV charge the battery while driving or on SP. Those wiring harnesses are pretty light gauge.

Be well.

J & J + Kickr's the Vonderhund
DRV, ES-38RSSA, 19.6K#
GMC, 3500HD-Max, CC, 8'-DRW, 9.1K#
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Old 08-12-2016, 10:32 PM   #3
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Location: St Louis, MO
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Good Advise.. I was most interested in bringing power to the boat while charging battery and driving.. My friend brought the power lift over...seemed like a good fit. thanks for watching
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Old 08-13-2016, 09:51 AM   #4
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Location: Upper Right Ohio.. or?
Posts: 274
12 volt devices that Work need lots of amps.. and heavy wire is key for proper operation...

when I installed my power jack... I used an old style Ford starter solenoid... and a rocker switch. mounded same under the propane cover and fuse is inside battery box..
or run a dedicated power wire from truck battery to rear bumper.. with fuse.

do not use 30 amp headlight relay.. not UP to the job.
2012 Ford F 250,"XL" 6.2L Gas, 2 wheel drive. 145,000 miles
2005 Coachmen 29FKCS, Front Kitchen... 2005 Honda VTX1800F
N.E. Ohio in the Spring, Summer, Autumn.
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install, power

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