Fresh water tank new level sender and guage

K

ken emigh

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Joined
Mar 25, 2007
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25623
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154
1996 carver 380
Replacing fresh water level sender and gauge with wema equipment.
When I connected the wiring at sender, black to black, pink to orange. At gauge red to orange, blue to black and black to purple.

When power applied gauge pegged to full.

Sender and gauge wiring:
Sender 2 wires, black, to gauge, pink to ground.
Gauge 3 wires, red to positive, black to sensor, blue to ground.

Boat side wiring:
At gauge - Double black connected to spade connector.
Double purple connected to spade connector.
Single orange connected to spade connector.

At sender - one black wire, one orange wire and one purple wire that was not being used not sure if it terminates anywhere.

Old sensor and gauge were VDO equipment.

I'm sure this is a wiring glitch.

Need some help on this one.
I assume black is ground and red or orange is positive.
Not sure what purple wire is used for?

Thanks in advance
 
The WEMA site has installation directions. On the WEMA sender, pink is + and black is ground. With no power connection, you should read ~240 Ohms at Empty and ~30 Ohms at Full. If you apply power and the gauge reads Full... maybe your tank is full :)

-Chris
 
FYI carver owners:
At least for those with a 1996 380, could be for a number of Carver vessels?
Carver rep advised me of the following:
At the gauge site boat side wiring: black is ground, purple is power lead and the orange wire is to the sender.
At sending unit site (water tank) boat side wiring: black is ground and orange is to gauge.
Heading down to boat today to do a number of things will advise later if this actually worked.
I believe it will, makes some sense now that I understand the wiring configuration.
Also for original equipment VDO gauge operating ohms is the European Standard unless manufacture requested American Standard.
 
What was wrong with the old unit? Was it doing the same thing? I would use a multimeter to confirm wiring, make sure you ground and power are correct and then make check the resistance across the sending sensor. If the is no resistance at the sending unit then this would explain why the gauge is pegged. You should disconnect the wiring to the sending unit when you test it as it may be pinched somewhere causing the problem or a strand of wire may be bridging the screw terminals. Let us know what you find.
 
A connection point broke on the old sender. New sender is a wema, not compatible with vdo gauge.
So got a new wema gauge.
Wired sender and gauge as described by carver rep. Everything working now.
Did the ohms test at sender. Read 240 for empty as described by wema information.
 
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