In Canada, the trucks we can import need daytime running (DTR) lights installed to run on the roads. Suzuki, Mitsubishi, and several other manufacturers use a 12 volt live feed to the headlights and switch the ground. On the container of the DTR system, it actually mentions a bunch of manufacturers the system won't work for. If yours is mentioned on the container, then it's probably because you have a ground switched headlight system. :frustration: To find out if this is the system you have, simply use a volt meter or test light to see if the feed to the headlight is live. If you get a reading around 12 volts or the test light comes on without turning the lights on, you have a ground switched headlight system and need to adapt the off the shelf DTR light system. These work off the common N. American standard of switching the 12 volt (live) feed. If you have a switched live feed, you will not get the DTR to work as they supply 12 volts to power the headlights. Since you already have 12 volts supplied to the lights, what you need to do is connect the headlight low beam wire to ground. Therefore the DTR light systems out there won't work unless you add a modification. :sly: I bought 2 extra headlght relays (about $12 total) and ran the feeds from the DTR light system to the primary side of the relay. The other side of the primary of the relay goes to ground. Tapping into the low beam wire of the headlight, run a wire to one of the switched (secondary) terminals of the relay. The other terminal on the secondary side of the relay is then connected to ground. This way, when the key is turned to the run position, the DTR system supplies 12 volts to the primary of the relay, energizing it. This then connects the low beam feed to ground and the headlights will turn on. The great thing about this adaptation is that you do not have to tear apart the DTR light system and void it's certification. Since you are just adding relays meant for headlights anyway, they will handle the current and operate as you need. By the way, the second relay is needed for the high beam wire and is hooked up identical to the low beam relay. If anybody wants a schematic, I can provide you with one as well as photos of the install.