Relay Wiring - Shower Sump - Help Needed

[Wotname]

Originally Posted by UFO

I got that and the Diagram was pretty clear, but when attaching the Pump to 87A it came on without any input from the switch or Float, but when attaching to 87 it worked as it should - Maybe I misread the schematic on the side of the relay and confused 87 & 87A pins - I'll check next time i'm on the boat

OK.

FWIW, pin 87A is the pin in the 'middle' of the 5 pins on the base of the relay.

Pin 87 has the same orientation as pin 87A while pin 30 is 90 degrees to these (87 & 87A).

Pin 30, 31 and 15 are all the same orientation.

You probably know this already !

[TonyP2000]

I’m doing this same replacement of the Scheiber relay. I have the Hella timed relay with the pins 30, 31, 15, 87 & 87a. I’m struggling with where the 6 wires from the old relay connect. I think the battery + and - go to 30 and 31. What about the 2 wires from the pump and the float switch?

[OldGreyB]

Originally Posted by TonyP2000

I’m doing this same replacement of the Scheiber relay. I have the Hella timed relay with the pins 30, 31, 15, 87 & 87a. I’m struggling with where the 6 wires from the old relay connect. I think the battery + and - go to 30 and 31. What about the 2 wires from the pump and the float switch?

I am reposting a Rev 1 of the circuit posted in Post #7. I have updated with comments and descriptors, also showing the Hella de-energised state better graphically. Follow these terminations and you should be good.

Post back with your success or issues.

[TonyP2000]

Originally Posted by OldGreyB

I am reposting a Rev 1 of the circuit posted in Post #7. I have updated with comments and descriptors, also showing the Hella de-energised state better graphically. Follow these terminations and you should be good.

Post back with your success or issues.

I sincerely appreciate your response and additional efforts making the updates. I am still hoping for a simpler explanation as I struggle to understand some of these diagrams. A simplified answer, for my electrical intellect, means something like this: battery + to post 30, battery - to post 31, pump + to post 87…..

[OldGreyB]

Originally Posted by TonyP2000

I sincerely appreciate your response and additional efforts making the updates. I am still hoping for a simpler explanation as I struggle to understand some of these diagrams. A simplified answer, for my electrical intellect, means something like this: battery + to post 30, battery - to post 31, pump + to post 87…..

Without knowledge of your boats existing wiring, its difficult to advise further.

One way foward is for you look at the Rev 1 diagam and trace from each number on the relay to the connected device. Then locate that device on your boat, the appropriate wire , then connect that to the relay numbered terminal, one connection at a time.

Another and perhaps better way forward is local yachting communities are normally helpful sharing folks. Approach a local with basic boat wiring knowledge to assist.