Rust Inside Ammeter

400D Guy · Feb 25, 2012

Like a bonehead I powerwashed my dashboard and got water inside the ammeter. I left it alone for 30 days, the water is gone, but now I have rust inside the glass near some metal in the lower left hand corner.

Is the ammeter ruined? How would I check it? I am currently rebuilding the tractor and don't want to take the dash apart after assembly.

Janicholson · Feb 25, 2012

It might not be ruined as in not working, but it will be very difficult to remove the glass W/O destroying the bezel. Jim

gene bender · Feb 25, 2012

You can remove it and using a lite in series and two jumpers you can test for the needle movement and by reversing the leads check for needle movement the other way. No being careful you can remove the bezel with a small screwdriver and clean the face and glass. I have replaced the glass several times fr.om an old flashlite. It can be done

Bob M · Feb 25, 2012

A quick check for ammeter operation is to bring a small magnet close to the gage face then move it around while watching the gage hand. If the hand left and right of 0 the ammeter is working OK.

400D Guy · Feb 26, 2012

Thanks all, for the information and suggestions.

gene bender · Feb 27, 2012

Just beause the needle moves doesent mean it will move when current flows thru

Rust Inside Ammeter

400D Guy

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Janicholson

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gene bender

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Bob M

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400D Guy

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gene bender

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