pkucan

98 JGC Laredo I6. My DMM must be shot because I can't measure Amps so I'm using a test light.
Here is what I'm experiencing, a big parasitic draw (bright test light flashing).
Pulled fuse #7 (20 Amp) and the test light is not lit.
But I put fuse 7 in back in and pulled the 50 Amp Mux/t tow fuze and no test light lit.
But put the 50 Amp fuse back in and pulled the 40 Amp IOD fuse and I have a very dim test light which is not flashing.
Does anyone know what this means or where do I go from here?