200ma Won’t Trigger Relay

If you use a PNP transistor, you have to change the switching of the relay from ground switched to high switched; the emitter should be connected to +12V, and the collector to the relay coil terminal. The other side of the relay coil should be grounded. Connect the base from your alarm (-) output through a 1 to 5k resistor. Before you go through the trouble you should find out why the alarm output isn't able to pull the relay closed. If the output's blown but somehow still able to switch a light load then you can add the transistor stage as a workaround.

update: All is well now... i ran positive and negative wires straight from the battery and it didn't fix the problem. so, i added the TIP42G along with a relay and it worked out great. thanks to all who helped....

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