Lights flickering with water pump

[sameo416]

All of the LED fixtures flicker when the water pump is operating. This is likely a voltage fluctuation caused by the pump motor.

Has anyone else experienced this? Has anyone found a fix?

My connections are all tight.

My plan is to put a capacitor in parallel with the pump, or to source a noise filter (which will have the same effect)

[tdf-texas]

You have a dubious electrical connection somewhere between the pump to the WFCO fuse panel and the batteries/converter.

With a voltmeter, measure the voltage at the fuse supplying the pump, then at the battery cutoff switch, then the battery itself and see where the voltage drop is occurring with the pump running.

That should pinpoint where you have an electrical connection that is causing the voltage drop and then fix the connection.

Below is a link to the wiring diagrams to assist you in tracing the problem.
https://www.escapeforum.org/forums/f...ams-19980.html

[sameo416]

Not entirely sure how a static loose connection modulates voltage/current. As I said, there aren’t any loose connections.

It’s the water pump motor that’s causing the fluctuations which vary with pump speed.

[mr.stang]

I had the same problem. long story short, check your grounds to the chassis. I had multiple locations, Self drilling screws over paint. Thru-bolted, clean metal, recoated, problem solved.

[tdf-texas]

You're not looking for loose connections but bad connections - corrosion on the terminals, bad crimps, etc. Connections that have too much resistance across them such that when the pump runs, causes too much of a voltage drop to the rest of the stuff that circuit powers.

That's why you want to measure the voltage drops across all the connections between the battery/converter to the pump to find that bad connection that is causing the voltage to drop too much.