Join Date: May 2005
Location: Mayenne France
My Motorhome: Pilote 733 FJ
Thanked 188 Times in 165 Posts
Looks like the two 20 amp fuses on the left of your photo will control the fridge and heater.
To check whether the fuses are OK or not, pull them out and then, on the tester fit the black lead into the socket marked COM, red lead into the one to the right of it marked V Ὠ,, set the dial scale to one of the settings to the left of the 6 o clock position for simple continuity testing use the highest scale, then using the probes touch one probe to each of the legs of fuse if OK the scale will register a value, if they have failed then the display should not change.
You ought to try to find the cause of the failure, which is likely to be more involved.
Last edited by eurajohn; 15-08-2019 at 20:07.