This is a battery charger for 2x36V Li-Ion batteries. Would only charge to 60%. The part in the circle is a 2N7002 N-MOSFET for switching the voltage measurement to the uC. It should have 3 Ohms at 3V VGS but it did not anymore. It was really hard to find that fault and a second one as well.

Fixing a Midland ALAN 95 PLUS handheld CB radio. Channels 41 to 80 (B band 1-40) are OK, but at C band the oscillator does not lock, because the range is not set right. I think there are chances that this wire has something to do with it.

If you have redesigned only a part of the design and you are too lazy to build all the rest of it just to test the redesigned part: Go Frankenstein