keyless entry, 69 chevy pick up

Hi,

This is my first post.  I have a question about my vehicle, it is a 69 Chevy pick up.  I am installing an Omega REC-12 keyless entry system and it has a light flashing polarity selection.  My question is about the polarity of my light circuitry, is it (-) or (+)?  I think it is (+) but I am not 100% sure.  The dome light pin switch grounds the circuit and turns the light off when the door is closed, this is the reason for my uncertainty.

Thanks,

Thanks for the reply.  So from what is posted above I think I understand...the light circuitry is postive polarity, so i would select (+) polarity (the instructions tell me to connect a particular wire to the RED(+) wire to make it postive polarity and connect it to the BLACK(-) wire for negative polarity.

There are 2 wires for the domelight supervision This is what is printed in the manual:

"By default, these wires will turn on the vehicles interior lights for 30 seconds after unlocking by the transmitter.  Connect the FUSED wire to either +12v or ground, depending on the fehicles light circuit requirements.  Connect the NON-FUSED wire to the domelight circuit in the car."

So would I hook the FUSED wire to +12v source or ground?

Ok, no, I guess that is why I came here.  I missed where you asked me if I knew how to use a DMM and test.

Thank you for your help.  That makes perfect since now.