First understand that the front jacks are driven by an electrical motor. The slides are controlled by a hydraulic pump system. They are completely independent of each other. You have to diagnose each of them separately.
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Originally Posted by Remi
First image is electrical panel with a 15 amp fuse. I don’t know where this blue wire leads to nor if it is equivalent to the common orange wire with a 30 amp or more fuse. The cover of the fuse holder says 15 amps). Also I don’t know what the blue bottom on the lower RHS of the panel is for. Is this a reset switch?
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That is a picture of the "brain" for the remote control system. 2010 models (and others) had a handheld remote control device which would allow you to move the slides, awnings, stabilizer jacks, and such (hot the front jacks). The 15 Amp fuse appears to be the power supply for the "brain" The Blue button is used to "Program" the handheld remote to the "brain". As you didn't mention a remote I am assuming you don't have it.
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The second image is the same panel showing a red switch mounted above. I do not know what this switch is for. Is it a reset switch?
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To be honest I don't know what that red thing is for exactly. I suspect it is a self-resetting breaker for something. It will take some experimenting with a VOM to see what it controls.
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The third image is wiring that seems to be consistent with other images I have seen in posts that talk about changing from a 50 amp breaker to an 80 amp breaker. I don’t see an existing breaker of any type located anywhere near this wiring setup.
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Those rectangular devices under the wires with the yellow crimp connections are the 40 or 50 (it all depends on what they were usuing back then) self-resetting circuit breakers. The left most one feeds the hydraulic pump that drives the slides. You definitely want to check for 12V power on both sides of the two self-resetting CBs.
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Last image is the motor. Can someone tell me where/how to check voltage to see if the motor is getting power. I think this entire setup is by Lippet, based solely on markings on the wires. There is nothing else inside the compartment or in any of the manuals I was provided to indicate the company who supplied the landing gear equipment.
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Yup Lippert supplied all the pieces parts you are looking at. This is the motor that drives the front jacks. Montana uses a Double Pole Double Throw (DPDT) switch to power the motor. Depending on where you press (top or bottom) it sends 12V to the motor. The difference between where you press is the polarity. One side sends it as is and the other reverses it causing the motor to run forwards or backwards.
For the Landing legs you will need to use a VOM to follow the 12V power from the battery to the electric motor. There will be a 30 amp fuse in the wire somewhere which as likely blown That is the most common cause of the jacks not working.
For the Hydraulic Pump motor you will also need a VOM, Start at the battery and follow the wires to the right, and then left, self-resetting CB. There should be 12V across all of them. The most common problem is the left hand CB is shot. If things are good to there, then check you have 12V all the way to the reversing valve (Trobetta Solenoid - sorry BB_TX).
There have been occasions where the "brain" has locked out the external switches. But you wrote you got the slides to work using the inside switches so I don't think that that is your problem.