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Topic: Water Pump Relay (Read 942 times) previous topic - next topic

Water Pump Relay

Anyone happen to know where the water pump relay is on a 99 320? My pump quit last night and I noticed that the pump switch light was dimmer than usual. I checked the breaker in the bay and it shows 12 volts. At the hot at the pump, however, I get only 4 volts. I was thinking it was simply a bad ground but after making certain the ground is good at the pump, I'm thinking the problem must lie elsewhere. I see on my schematic that both the pump and water fill have relays. Maybe that's the problem but where the heck is that pesky relay??? Also, any other ideas?
jor
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Re: Water Pump Relay

Reply #1 –
Should be behind the white panel in the driver's side of the pass through bay.

Re: Water Pump Relay

Reply #2 –
Thanks, Bob. I'm aware of that 15 amp breaker switch which also controls the fill valve. I have 12v there and the fill valve operates fine. The schematic indicates a water pump relay and refers me to drawing number B2179 which I don't have. I fear that this relay might be behind the faucet assembly. Hope I'm wrong though.
jor
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Re: Water Pump Relay

Reply #3 –
Sorry I wasn't more clear. On my '99 U320 behind the white panel near the bottom, there are two relays, one for the water pump and one for the water fill. I replaced my water pump relay a few years ago.I don't have access to the part number info right now, but will find it and post it later today if that will help.

Re: Water Pump Relay

Reply #4 –
That would be great. Sent you a PM btw.

One other thing on my problem. I applied 12v directly to the pump and it works fine so my problem is simply very low voltage at the pump.
jor
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Re: Water Pump Relay

Reply #5 –
Howdy Jor, 
Here's a link to Barry and Cindy's info on replacing water pump relay:
How we replaced our water pump relay

Good Luck..
Dave and Nancy Abel
'00 U320 36' WTFE  Build #5669
'10 Jeep Wrangler Unlimited Rubicon
Livingston, TX  SKP's Fulltiming

Re: Water Pump Relay

Reply #6 –
OK, Bob and Dave. Thanks. I see it now. I had thought the two black boxes labeled "radio" and "coach" etc. were for the door latches. I was thinking RF. Anyhow, I'll try and get a replacement as suggested in the many posts on this subject. Thanks, guys.
jor
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Re: Water Pump Relay

Reply #7 –
Here's a better photo of the relays. These are Intellitec. Intellitec also sells dedicated water pump relays. Not sure why FT chose to go with the ones designed for RV radios. Anyhow, I found a source for these online and ordered two.
jor
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Re: Water Pump Relay

Reply #8 –
Dave & Nancy,

I could not have said it better or faster.

Thanks, Barry & Cindy