Check 6 and 12V circuits for voltage and spark plugs for spark. To use, ground the clip and touch the probe to the pointbeing tested. The tester bulb will light if voltageis present. To use as a spark tester, screw theprobe into the opposite end of the handle.
- Replacement part: 126-75 GE 1449 Bulb
- Replacement part: 126-78 Neon Bulb