cheapo autozone timing light?

[SR240DET]

my friends has a cheapo timing light from auto zone"actron" and its got a gator clamp for the spark plug... and a spring... hmm.. i dunno.. if any has used one could you please tell me how this damn thing works?

[Liquid]

ive got one too, its pretty simple. You connect the black clamp to a ground, red to the + side of the battery, then you have to connect the green gator clip to the spark plug wire. Since its a cheapo i doubt he got an inductive clip so you have to run a wire into where the spark plug meets the spark plug cable (coil(sr)) so that you can pick up the spark.

[sykikchimp]

I have the same light.. it just goes around the #1 spark plug wire, and picks up the signal.