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Topic: Fresh water pump relay (Read 918 times) previous topic - next topic

Fresh water pump relay

The fresh water pump relay in our 91 GV is no longer available.  We've been burning out relays rather quickly so I called FT parts and asked if they had these relays.  They have quit using that relay and are using a different one in the newer models.  ( I didn't ask what "newer" was )  They have a newer relay that can be used in older models like ours, but needs to be re-wired to work.  They are sending me the new relay and instructions on how to re-wire it.  The relays from NAPA, etc. just wont work they said.  If any one has this problem, call FT parts.  Thanks and have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: Fresh water pump relay

Reply #1 –
It is a VW bug headlight latching relay. OEM German or Chinese aftermarket available ebay. Some variants may have to be mounted so the lugs stick out rather than down. A little work may be needed to fasten it down securely on some. Also used on other VW models. Has to be latching. See my earlier posts for part numbers.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Fresh water pump relay

Reply #2 –
OEM part number: 111-941-583  Here is the ebay listing. relay 111-941-583 | eBay Lots of styles and prices but all work the same. The metal ones with the tab on the top are easiest to mount.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Fresh water pump relay

Reply #3 –
Fritz,
Did you upgrade your pump lately?
When I replaced my water pump some time ago the installation instructions warned about pulling more current than older generation units and that some toggle relays (i.e. the VW type) can't handle the extra current.  The instructions advised to use a second 30 amp "auto" relay to actually power the pump.  So the old toggle relay only powers the coil to the added 30 amp auto relay.  A new larger capacity toggle relay from FT should do the trick too.  Let us know how it works out.
-John Fitz
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho

Re: Fresh water pump relay

Reply #4 –
John,

Using OEM pump. Relay has been working well. Headlights draw quite a bit of juice. I replaced mine with an exact German model. The  original had loose connectors that overheated. Wonder if The low cost Chinese c!ones are the problem? I have a large Jabsco pump so might use your idea of a second relay or use a second VW relay in parallel if I ever use the Jabsco.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Fresh water pump relay

Reply #5 –
John  ----  I did replace my water pump and things worked fine for a while as you know, but the system wouldn't hold a relay.  I don't remember getting any instructions with the new pump talking about upgrading the relay.  When I talked to FT parts, they said that none of the other kinds would work (I specifically asked about the VW relay).  There are other
ways I'm sure, but I will follow FT suggestion at this point and I will post the results of the re-wiring situation. 

Pierce ----  Thanks for the input, I tried a NAPA and a Borg Warner, I never tried the VW one, but as mentioned, I will go with FT for now.

Thanks again and have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: Fresh water pump relay

Reply #6 –
Fritz,

I think OEM Foretravel relay is the VW. Ours was original and was the German VW.

Pierce
Pierce and Gaylie Stewart
'93 U300/36 WTBI
Detroit 6V-92TA Jake
1140 watts on the roof
SBFD (ret)

Re: Fresh water pump relay

Reply #7 –
The VW relay is a common replacement but I'm betting FT will send you a Finder latching relay like the one in this photo. I got one from them a couple of years ago and they included a little note with simple wiring instructions (burned out my original after installing a water pump that drew more current). You can also get this relay on line from many sources. Finder Latching Relay: 20.21.9.012
jor
93 225
95 300
97 270
99 320

Re: Fresh water pump relay

Reply #9 –
Do the sources mentioned give you a re-wiring dia. ??  If you're just getting a relay, they'd be OK I suspect, but on these older coaches there is a modification to be made, so I'm thinking that FT has to be the source.  Thanks and have a great day  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: Fresh water pump relay

Reply #10 –
Fritz,
  Here's the schematic with the wiring for the Finder noted in the top right. It's really just a jumper. Probably cheaper online.
jor

93 225
95 300
97 270
99 320

Re: Fresh water pump relay

Reply #11 –
jor  ----  Thanks for the sketch.  I have one coming from FT, but I can use this to get a head start.  I see that it is a FT sketch.  Thanks again  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: Fresh water pump relay

Reply #12 –
Installed the new fresh water pump relay and all is a go at this point in time.  I'll consider that I can cross that problem off my "open items" list.

Jor  ----  Your sketch was a big help.  The FT schematic that came with the relay showed one wire that was white and I didn't have a white one.  It turned out to be green which was the one you showed as the one being from the "S" terminal of the old relay.  It was the only one left, but green is normally GRND and I was skeptical.  Thanks again  ----  Fritz
Fritz & Kathy Johnson
1991 36'

Re: Fresh water pump relay

Reply #13 –
Quote from: Jim Frerichs –
Here is a source for a latching relay...

2 Step Impulse/Latching Relay, SPST-NO 16A, 12V DC coil, AgSn...
Jim
That is the same place I bought my Finder Relay. I changed it out with the same wiring.
The selected media item is not currently available.Barry BEAM #16014
2003 U320 40' AGDS
Beamalarm, Foretravel technical help and specifications
"Whatever the mind can conceive and believe, it can achieve"
 

Re: Fresh water pump relay

Reply #14 –
I didn't have to change any wiring either.  In fact, I used some spade lugs and connected them into the relay and all I had to do was to plug in the existing wiring to the relay.  That worked out well since the relay on our 91 GV is under the couch so I didn't have to work under there making up wiring.  Thanks for the info and have a great day  ----  Fritz 
Fritz & Kathy Johnson
1991 36'