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tomthyme

Flower Mound, TX

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Posted: 03/06/18 01:31pm Link  |  Quote  |  Print  |  Notify Moderator

Hi Folks! I need a little help with some water pump issues.

A couple of months ago we got our rig out of storage and found the water pump wasn't working. I have experience with the 'vapor lock' so I tried to manually prime the thing to no avail. The problem I noticed is that it wasn't pumping at all. The motor wasn't running. When I checked the screen filter attached to the pump, I fond a small piece of plastic in the basket. I checked all the fuses, found them all to be good and went on about my way assuming the pump was ready for replacement.

After receiving my replacement water pump, I performed many Cirque de Soliel contortions and got the pump swap done. When I turned on the power, the new pump wouldn't run either! DDDAAAANNNGGGGIIITTT!!!....

I checked fuses again. Everything else on the 12v panel works and all the fuses are good, so I kept checking.

In a moment of brilliance (although late in the game), I took the old pump to my truck and touched the wires to my battery. The old pump fired right up!

So now, I am trying to figure out how to trace the obvious power problem.

There are two switches for the pump, one outside and one inside. So here's what I"m thinking: a) maybe the switches are bad - both of them?, b) maybe the power wire from the back of the 12v panel lost connection?

Other than tracing the electrical line, I'm not sure what else to do.

To trace the line, I will empty the basement, then pull the thin wall material. That will expose the back of the 12v panel (I think) and should show me the entire run from the panel to the pump.

Am I remotely on the right track? Do you guys have any other ideas?

Thanks so much!


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rrupert

NW PA

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Posted: 03/06/18 01:48pm Link  |  Quote  |  Print  |  Notify Moderator

Did you actually test the fuses or did you visually check them. Fuses can look good but may be burned in a spot that is out of view. That's a common happening.


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tomthyme

Flower Mound, TX

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Posted: 03/06/18 01:49pm Link  |  Quote  |  Print  |  Notify Moderator

rrupert wrote:

Did you actually test the fuses or did you visually check them. Fuses can look good but may be burned in a spot that is out of view. That's a common happening.


visual inspection only....I will replace and see if we have success! Thank you!

midnightsadie

ohio

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Posted: 03/06/18 02:02pm Link  |  Quote  |  Print  |  Notify Moderator

yep seen fuses get oxidation on them and not work. if you don,t have a meter? get one of the cheapies at harbor frt. save a lot of work.

tomthyme

Flower Mound, TX

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Posted: 03/06/18 04:07pm Link  |  Quote  |  Print  |  Notify Moderator

.......oooooohhhhhhh my - sorry folks, I missed a connection. My big head couldn't squeeze into that little spot to see that there was a wire not connected. Problem solved. Thanks anyway!

And, I appreciate the fuse input. I"ll keep that knowledge for next time.

Thanks

DogTrainer

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Posted: 03/07/18 07:53am Link  |  Quote  |  Print  |  Notify Moderator

you need a meter, Harbor Freight comments was spot on.


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Farmboy666

Pisgah Forest, NC

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Posted: 03/07/18 08:51am Link  |  Quote  |  Print  |  Notify Moderator

midnightsadie wrote:

yep seen fuses get oxidation on them and not work. if you don,t have a meter? get one of the cheapies at harbor frt. save a lot of work.


Why is it so common to suggest a cheap meter form HF, why not just buy a quality one. You get what you pay for and cheap tools will let you down at the worst possible time. It's one of the tools you should have when you own an RV, get a good one.

bpounds

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Posted: 03/07/18 09:25am Link  |  Quote  |  Print  |  Notify Moderator

Farmboy666 wrote:


Why is it so common to suggest a cheap meter form HF...


Because it is all you need to t-shoot anything on an RV. Many people have gone their whole lives without ever owning a DVM, somehow survived, and to push a more expensive meter on them that they will never fully use to its potential is just, at best silly, at worst pompous.


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Farmboy666

Pisgah Forest, NC

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Posted: 03/07/18 09:49am Link  |  Quote  |  Print  |  Notify Moderator

bpounds wrote:

Farmboy666 wrote:


Why is it so common to suggest a cheap meter form HF...


Because it is all you need to t-shoot anything on an RV. Many people have gone their whole lives without ever owning a DVM, somehow survived, and to push a more expensive meter on them that they will never fully use to its potential is just, at best silly, at worst pompous.


Like I said you get what you pay for. If you can afford an RV you should be able to afford a decent reliable tool. At the end of the day what are you saving $30.00 ?

rrupert

NW PA

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Posted: 03/07/18 01:02pm Link  |  Quote  |  Print  |  Notify Moderator

I have a little Gardner-Bender DVM that I thought was good until I compared it's readings against a Fluke DVM and found out my meter was reading high by .5 to 1.5 volts DC. The RV batteries weren't in as good of shape as I thought. I purchased an Amprobe AM-510 Commercial/Residential grade DVM that competes with the Fluke and it was only $30 from Amazon. It works good enough for me.

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