Frequency and intensity of flash indicates whether there is an ignition system problem or a fault in the fuel delivery system. Flash can be seen in bright sunlight. Clear plastic body can withstand rough use and resists automotive chemicals. Protected by mechanical strain relief. No need for volumes of service manuals or electrical specifications.
Tests spark plug wires for continuity on all vehicles.
Attaches to vehicle's 12 volt battery for power and dynamic, load testing of modules. Detailed, easy to use application chart provides specific hook-up for different vehicles. Color coded cables for foolproof testing. Use on or off the vehicle. Tests continuity, diodes and voltage on standard 12 volt circuits.