Converting HappiJac 4200 and 4160 Manual Jacks into Electric Jacks

Updated 09/04/2025 | Published 01/09/2021

Products Featured in This Question

HappiJac Manual Truck Camper Jack System - 34-1/2" Lift - 8,800 lbs

(18)

$2630.06

Replacement Motor Heads w Circuit Board and Remote for HappiJac Electric Truck Camper Jack Systems

(21)

$1403.89

Question:

I have an adventurer 86FB with 4200 and 4160 jacks. Id like to covert to electric. The camper is pre wired. Can you tell tell me where I can find the installation manual before I buy direct to see if I can manage the installation?

asked by: Craig T

Expert Reply:

The replacement manual jack for the 4200 and 4160 jacks are the HappiJac Manual Truck Camper Jack System, part # LC736514-4. We have the electric upgrade kit for this part, so we have the upgrade for you.

Because your camper is already pre-wired, you can get the version without the wiring, which is part # LC733960. I called HappiJac to get an installation manual for you. They did not have one, but they were able to get a wiring diagram for me, which I have emailed to you separately.

I've linked to a video review of the kit.

expert reply by: Kef G

Dan B.

9/3/2025

Hi Kef, I believe this may be a fairly old question by Craig. I too have a 2017 Adventurer 86FB, with 4160 jacks, I believe. Although the camper is pre-wired, there are two things to be aware of: First, but less impactful is the factory wiring to under-sink is 10ga and comes from the wiring center at the front of the camper. By the time your 12v gets from batteries to the front, and back to the sink, then out to the jacks, the voltage drop at the controller is too much, and it stops lifting (or lowering) when using all four jacks. Solution is simple, wire 8 ga wire directly from battery to the jack controller (which is what the controller manual says). Second, and a bigger deal, is that the optional electric jack from ALP/Adventurer is NOT the 4160 with an electric head. In fact, the heads won't fit as the factory mounting is too snug against the camper. You must build bracket extenders between the factory brackets and the jacks, moving them farther out from the mounts for the heads to fit, both front and rear. In the rear, that also means another bracket down at the bumper/step. Any "less than perfect" fabrication introduces slight angles to the jacks, exacerbated when they are extended, and the camper moves around much more while on the jacks at any height. Having done it, I would not recommend electrifying the jacks it came with, but rather buying the correct jacks, which Adventurer told me about when I called to ask how they made the heads fit on, hoping there was a factory bracket. Yes, it's expensive, but it's a much safer solution.