Interference to am radio from Waeco

Radio interference can be quite an issue and may be very hard to solve without right stuff.

Early Waeco's were very bad , later ones are less of an issue.

Your capacitor may or may not do anything - where was it fitted, inside on the Waeco control panel ?

Another thing that helps is a ferrite supression choke (Jaycar) which is in 2 halves and can clip together over the power wire (you can also loop the power wire thru them a few times, this helps if noise is running up the power lead.)

However the first thing to do is to try and see how the interference gets to the radio.

To test this, with the fridge in the car, disconect it from the cars 12v power and run it off a small battery pack.

If the noise goes away then the interference gets to the radio via its 12v wiring, and we would then look at earthing, suppression etc .

If noise doesn't mostly go away then its being radiated into the cars antenna, and working on fridge will give best results (after making sure aerial is as it should be).

Probably not much help but I have an "original" Waeco and have never had interference problems (Jackaroo with a Kenwood radio/CD unit). I installed a power outlet in the rear and don't run it off the ciggie plug though.