Mystery part behind the panel

[ThorLasVegas]

Hi there. I am redoing all the electrical and panel on a RV4 that I bought a couple of months ago. I am very excited to fly this incredible airplane.

I have come across a part behind the panel that I can not figure out what it is for. See attached pictures. I looks like a potentiometer of sorts. It looks to have an adjustment screw.

I am suspecting that it is part of the Ray Allen electric trim system installed. Perhaps an adjustment pot for the trim speed? Thoughts?

 

[fixnflyguy]

I take it you have much of the electrical system disturbed and can't operate the trim? I haven't seen a Ray Allen component like that before, but if it's wired into the trim system, likely that's what it is. I have RA trim on elevator and aileron on my -4 with no potentiometer. But, the trim speed adjustment has been installed by others, and without it, the trim only takes a tap of the button for results. I have all mine and electric flaps on the stick MAC grip, and its a sweet set-up.

 

[NTex]

without tracing out where the wiring goes, my guess would be a voltage regulator vs a trim speed scheduler.

To help answer the question, trace out where the wiring from your mystery box originates/goes.

 

[jabarr]

Based on wire colors, looks to be your turn signal flasher box. Adjustment is for speed of flashing.

 

[Webb]

Pull the trim breaker or fuse and see if the trim quits. If it doesn’t, try something else until you find what doesn’t work.

 

[bjdecker]

Based on wire colors, looks to be your turn signal flasher box. Adjustment is for speed of flashing.

Wig Wag Flasher module?

 

[Southern Pete]

My guess would be voltage regulator...
Time to start pulling fuses!

 

[Ralph Inkster]

Is that water corrosion on that Narco box?

 

[ShawnR]

An image search for Ray Allen's volt reg show different wire colours, and a different case. You could email Ray Allen and ask about older versions. I found them very helpful when I had questions about an indicator. If you can eliminate them, then move on. But as suggested, tracing wires would be the best place to start. Had to do that with a few unlabelled switches in the 9.