Originally Posted by xr-stu
i dont think they pluse 12v though, youd be better off with a multimeter, set it to 20volts and touch the pins of the multimeter on the connections then crank the engine.
be careful you dont bend the pins inside the clip though, took em a while to figure out where the missfire was coming from
Belive me, The bulb works, Ive tried this method on a few cars including a cossie