Trying to wire in my new Federal Signal siren package (PA300 and MS100) with PA. Haven't messed with the electrical on this vehicle other than installing an aftermarket alarm and keyless entry. Don't remember if the Rodeo is a positive or negative ground vehicle. Any help is appreciated.

If anyone is interested in the process of install, let me know and I will document thoroughly and take pictures. It's going to be in a few weeks, I'm just now getting prepared.

Also, if you have installed a similar setup in yours, I'd love to hear about your placement in the vehicle...that's still TBD on my end.

Your Rodeo is most certainly negative ground. No one has made a positive ground car for decades.