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Old 07-04-2017, 10:55 AM   #11
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Update: still not working. There is no master switch on this model. I upgraded to a bigger battery but no luck. I am going to try the car battery as seller suggests. May have to rewire everything as it is almost 40 years old. I watched the videos by Sting 32 and found some generally helpful advice. Will keep searching for the manual. Thank you!
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Old 07-04-2017, 12:33 PM   #12
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Hi Naomi: Welcome to the forum. Do NOT go back to a car battery. He just wants you to spend money. The marine/RV battery is the correct battery for the HiLo. This is a simple circuit and we should be able to help with finding the problem. I sent you a private message. Read it and get back with me.
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Old 07-04-2017, 01:50 PM   #13
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Originally Posted by JIM L View Post
Hi Naomi: Welcome to the forum. Do NOT go back to a car battery. He just wants you to spend money. The marine/RV battery is the correct battery for the HiLo. This is a simple circuit and we should be able to help with finding the problem. I sent you a private message. Read it and get back with me.
Pay attention to what Jim is saying. You ARE using the correct battery.

I think you have either got it hooked up incorrectly, or there is a faulty contact somewhere in the circuit, or, the lift motor has failed.

But, you said you heard "clicking" in your first post? That sounds like the motor solenoid is engaging, which would supply power to the motor. I wonder if it's possible you have hooked the battery up in "reverse"? (In other words, have you possibly connected the negative cable from the trailer to the positive terminal of the battery and the positive cable to the negative terminal?) If so, I think the solenoid would still pull in, but the motor would try to run backwards.

Pictures of your hookup would be helpful. But, work with Jim. He certainly knows how this system works, and I'm sure he can help you.

- Jack
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Old 07-04-2017, 04:59 PM   #14
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Naomi; Jack suggested that you may have hooked up the battery cables wrong. Lets hope not. This is a place that you need to know what you are doing is correct. The positive lead hooked to the positive post and the negative lead to the negative post on the battery. We know you have a new battery and you said you heard a clicking when you pressed the switch to raise the top. The pump/motor is a very reliable unit and rarely goes bad. Lets hope yours has not. My guess is that when you are hearing that clicking and you have a good battery is that you have a bad connection that is not letting enough power, voltage and amps , to run the pump. The negative battery cable is usually connected to the frame. Clean that connection and tighten it. Do the same to the positive cable that goes to the solenoid and the connection from the solenoid to the pump motor. The pump motor is either connected to the metal frame or has a ground lead from the motor to the frame to complete the circuit so clean and tighten this connection. Bad/corroded connections are a major problem thruout all RV circuits. When you hear that clicking this usually means a bad battery or connection. When you press the switch to raise the top the solenoid closes (click) then the voltage goes thru to the motor and the motor pulls so many amps, (over 100) that the voltage drops so much that the solenoid drops out, then the motor is no longer connected, the voltage goes back up and the solenoid snaps back in (click) and this just keep repeating its self. Since yours is over 30 yrs old another problem can be the battery cables themselves. The cables are made up of many small wires and these wires do corrode inside of the insulation where you cannot see them. As these wires corrode they get smaller in diameter and no longer able to carry the amp/voltage load and this can cause that voltage drop so something as simple and inexpensive as replacing the cables on old equipment can correct these problems. Hopes this helps. I can help better on the phone.
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Old 07-04-2017, 06:23 PM   #15
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Thanks, Jim - I have to admit my thought of reversing the connections was a bit of a stretch. I like the degraded connections you so aptly explained much better. The only hangup I have with that though is that the seller demonstrated the top lifting to Naomi before it was purchased. Why would the connections suddenly go bad?

Since there are no microprocessor circuits or other "delicate" components in the lifting circuit (just a magnet and a DC motor) it MIGHT be able to be connected in reverse without "letting any of the magic smoke out".

I dunno. I'd really like to see a photograph of how the battery is connected.

Naomi - the cables you are connecting to your battery should be very thick ones with round, bolt-on connections at the ends that fit over the battery terminals. If those cables are "colored", the RED one should go to the "+" terminal of the battery and the BLACK one should go to the "-" terminal of the battery.

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Old 07-05-2017, 10:08 AM   #16
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Naomi, I've not tried this on my 2176RB yet, but I've learned here on the forum [if my Brain is working correctly] that it may be just the Brushes in the Motor. If so, just tapping with a rubber mallet may dislodge any build up on the Brushes. Otherwise, new brushes may be the trick.

Doesn't make sense that it worked when the previous owner raised it for you though!
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Old 07-05-2017, 12:24 PM   #17
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Thanks, Jim - I have to admit my thought of reversing the connections was a bit of a stretch. I like the degraded connections you so aptly explained much better. The only hangup I have with that though is that the seller demonstrated the top lifting to Naomi before it was purchased. Why would the connections suddenly go bad?

Since there are no microprocessor circuits or other "delicate" components in the lifting circuit (just a magnet and a DC motor) it MIGHT be able to be connected in reverse without "letting any of the magic smoke out".

I dunno. I'd really like to see a photograph of how the battery is connected.

Naomi - the cables you are connecting to your battery should be very thick ones with round, bolt-on connections at the ends that fit over the battery terminals. If those cables are "colored", the RED one should go to the "+" terminal of the battery and the BLACK one should go to the "-" terminal of the battery.

- Jack
Jack; I agree that it seems strange that the top lifted when Naomi bought the HiLo but didn't later at home. Naomi should at least call the previous owner to see if he has any idea why it won't raise now. Owners over the years have made changes to their HiLos and hopefully this might be just a simple fix that he would know about. Jack you are wrong about there are no delicate components in the lifting circuit. On my HiLo the Positive battery cable goes directly to the hot side of the solenoid and directly from that stud to the two main 30 amp circuit breakers. The power then goes to the master switch but also bypasses the master switch and goes to the fridg and the power converter. If you reverse the battery cables on my Hilo just to check if they had been hooked up wrong you would be reverseing the polarity to the fridg and power converter. This is why I said that a person needs to know the correct way to hook up the battery in the first place because an instant of reverse polarity will do a lot of damage. Naomi's HiLo has no master switch so I would bet power is fed to all components when the battery is hooked up. The lifting circuit is not an isolated circuit in the HiLo.
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Old 07-05-2017, 12:32 PM   #18
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Originally Posted by Bruce from Kansas View Post
Naomi, I've not tried this on my 2176RB yet, but I've learned here on the forum [if my Brain is working correctly] that it may be just the Brushes in the Motor. If so, just tapping with a rubber mallet may dislodge any build up on the Brushes. Otherwise, new brushes may be the trick.

Doesn't make sense that it worked when the previous owner raised it for you though!
Bruce you are right that it could be brushes. After all It is about 35 years old. I have heard about the old hammer trick but never tried it. Any good auto electrical shop can rebuild the motor or replace it with a new or rebuilt one. It is just a common auto starter motor.
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Old 07-05-2017, 01:05 PM   #19
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Good catch, Jim! The refrigerator is certainly able to be powered directly from the battery, and, if it received reverse voltage, I suspect it would damage the control circuitry there.

But, if it were turned off, I think it would be isolated from the lifting circuit and would likely escape damage. Now, the Converter may or may not see that voltage - I don't know what happens if it is not connected to shore power.

I'm not going to try this out, because, like you, I don't like the idea of a reversed battery connection. I was just trying to come up with a possible reason for the lift motor not working, when it did before. And, from the OPs first post, I'm getting the feeling that Naomi might have limited knowledge of electrical systems.

If I'm wrong, I hope Naomi is not insulted. I'm just looking at all possibilities and trying to help.

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Old 07-05-2017, 01:55 PM   #20
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Jim,- My Old 2176B is connected just as yours. The Positive Cable goes directly to the Pump and all other Power is directed from that point. As I recall (haven't refreshed my memory by looking again) the ground connects to the solenoid or top of the Pump.{?}
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