ShurFlo 5.7

[timvasqz]

just as important as a good connection to the 12V+ is the ground- connection from the pump to bus frame.

If the pump doesnt fault when the detroit is running at high idle, that may prove bad electrical connections + or - . Running the Detroit should push 14V at the pump and not leave you with a marginal 12ish from the at rest batteries.

the relay that now powers your pump could have issue with the internal wire between post 30 and 87, or the fuse to that post 30 is screwed. I would find the two and change them out without even checking them. 22 years.

To run new+12volts; I dont know how and where you turn on the pump but in the 94pt there are several places to switch it on (above driver, kitchen, bathroom, outdoorsink and bedroom overhead) so if you power it with new wire , I would install a Bosch relayclose to the pump

• 30 to new good power +
• 85 to old marginal power to trip relay
• 86 to good ground
• 87 to the pump
[/list]


with the bosch you will not need to add any new switches and the old multi switch configuration should continue to work.


GregoryO'Connor ofTim&Greg 94ptCa
--- In WanderlodgeForum@yahoogroups.com, "freewill2008" wrote:
>
> Test the voltage as close to the pump as possible. The idea is that
> the voltage should drop a little when the pump runs. This means the
> pump is drawing power, as it should.
>
> If the voltage goes up as the pump stops, then the pump itself has
> stopped drawing power meaning the internal pump controller is
> responsible for the stoppage.
>
> If the voltage goes way down or off as the pump stops, then the problem
> is with the bus's supply of power to the pump. This could be a breaker
> going off and then auto-resetting. Also, there could be a pressure
> control device installed by BB that interrupts the power to the pump.
> Finally, a bad connection might suddenly show up with a new pump that
> draws more power. This could be a hard one to find, but it is also
> less likely.
>
> Bob Griesel '84 FC31 WLII WA
>
> --- In WanderlodgeForum@yahoogroups.com, "Ryan Wright"
> ryanpwright@ wrote:
> >
> > I should ask, if it is voltage drop, is there a convenient place back
> > there to tie into a hot lead that will handle the power? Or am I going
> > to be tearing everything apart to fish a wire down to the batteries?
> >
> > -Ryan
> > '86 PT-40 8V92
> >
> > On Thu, Dec 11, 2008 at 10:54 PM, Ryan Wright ryanpwright@ wrote:
> > > Thanks for the advice, folks. I'll check for voltage drop and if
> > > that's not the issue, I'll get the pump replaced under warranty, buy
> > > an Aquajet and keep the Shurflo as a backup.
> > >
> > > -Ryan
> > > '86 PT-40 8V92
> > >
> >
>