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Old 08-16-2016, 07:40 AM   #1
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Question 1993 National Sea Breeze Fuel Pump Circuit

I just purchased a 1993 31' National Sea Breeze. It has been sitting for ? years. It was used as a temp residence by family members who neglected it a bit. The RV only has 40,000 miles on it, so a little neglect can be fixed with some TLC.

When attempting to start the RV, I discovered there was no fuel pressure, and the fuel pump was not running. In the course of diagnosing this I discovered there was apparently no power to the pump. To check the pump itself I hot-wired it to a running light circuit and got excessive amperage drain, hence, bad pump.

The new pump will be here today but I can't get back to the RV until next Sunday to install it. I still have the issue of no power. This tells me there is most likely a fuse or relay that is bad, however, I cannot locate either. To make matters worse, the pump was apparently replaced in 2005 or later, and whoever did it, cut and spliced the wiring to the pump assembly instead of unplugging it from the connector. AT that time it seems they transferred the hot lead to a different source, bypassing the original power source lead. So far I have not been able to fully trace either wire to it's source. Neither appears to be connected to the fuse block under the dash, and there is no reset switch under the dash by the column as indicated for some models. I have yet to find a viable schematic for the fuel system wiring for this model.
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Old 08-16-2016, 11:20 AM   #2
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Welcome to iRV2.

Ford or Chevy chassis? I think that National built on both back in the day.

If you can add your chassis manufacturer, maybe a moderator will move your post to that forum and you'll get better answers.
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Old 08-16-2016, 12:13 PM   #3
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Chassis

It is a Ford E350 Chassis, 460 BB, (Thanks for the suggestion!)
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Old 08-17-2016, 08:53 AM   #4
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Quote:
Originally Posted by vgrichards View Post
It is a Ford E350 Chassis, 460 BB, (Thanks for the suggestion!)
Does it have a van cab (cutaway) or is it a class A? Class A would be a F53, 31' seems a bit long for a Cutaway of that vintage.
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Old 08-17-2016, 09:39 AM   #5
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If your RV does have the van front ( E-350 chassis ) then any long established Ford dealer should have shop manuals on the wiring and maybe you could get some pages photo copied.
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