Ian @Roinik wrote: »
You can always test them with a 1.5V dc power supply. I'd expect them to be directional as they are an electro-magnet designed to lift the pin against a spring. Hence the coil will obey the right hand rule.
tim @timbo wrote: »
Try Ians suggestion test leads with a 9v battery and you will find it fires normally either way you connect the polarity
Kevin @harpdevice wrote: »
Thanks everyone for the input - the wire harness has been installed it worked 1st try!!!
There were no polarity issues - it did not matter which way the injector connectors were connected. (hahaha)