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Ok, I've got this all figured out now thanks to a trip over to 12volt.com.

If anyone is ever going to be using relays and has no clue on what to do, read this! All pictures posted belong to 12volt.com and not myself. They're being used to illustrate what they say on their website. :)

If you have a switch or an alarm or keyless entry that has a negative output that you wish to use to switch a device that requires 12V+ such as a horn, dome light, parking lights, head lights, hatch release, etc., wire a relay as shown below to convert the negative output (trigger) to a positive output.



Here's the same configuration showing a negative output from an alarm or remote keyless entry used to activate a trunk release solenoid that requires 12V+ to release the trunk.
If you have a switch or an alarm or keyless entry that has a positive output that you wish to use to switch a device that requires a ground such as a horn, dome light, parking lights, head lights, hatch release, etc., wire a relay as shown below to convert the positive output (trigger) to a negative output.


Here's the same configuration showing a positive output from an alarm or remote keyless entry used to activate a vehicle's parking light relay that requires a ground to turn the lights on.
 
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