30 amp in-line fuse continually blows
Boy do I need some help! Every time I try to extend the landing gear on our 5th wheel when hitching or unhitching the 30 amp inline fuse blows after a few seconds. We had this problem a few years ...
Forum Discussion
it is common for an AC motor to draw more amperage with low voltage - impossible for this to happen with a brush type DC motor UNLESS
The non performance forces a person to lay on the switch and slowly but surely the motor heats up.
usually a bad field coil will cause this but if the motor is permanent magnet a filthy commutator, grease and graphite can suck 30+ extra amperes.
OR
A mechanical failure in the slide or landing gear causes the motor to overwork. A hot battery allows the motor to pass through the bad spot.
All of this is guesswork. The motor needs to be ampere checked free spin and the gear needs to be hand cranked to evaluate if it is binding.
The non performance forces a person to lay on the switch and slowly but surely the motor heats up.
usually a bad field coil will cause this but if the motor is permanent magnet a filthy commutator, grease and graphite can suck 30+ extra amperes.
OR
A mechanical failure in the slide or landing gear causes the motor to overwork. A hot battery allows the motor to pass through the bad spot.
All of this is guesswork. The motor needs to be ampere checked free spin and the gear needs to be hand cranked to evaluate if it is binding.
