2010 mercury mariner, avital 5303

Ground activates the door lock as it should. Where should I go from here?

Test the output of the alarm system. It should go to groundIf i Can't Install it    I Don't need it   Joe

That still shows the same as yesterday has 12v, I hit unlock it drops to 7v then bounces back up to 12v

From the readings you stated I would say the output isn't working correctly. Did you buy the unit new ?If i Can't Install it    I Don't need it   Joe

Well it was one of their manufacturer refurbished units, but I think it still came with a warrantee I'll just have to go back to who I bought it from since dei doesn't deal with the consumers. Since I've been learning new things as I go. How does the negative trigger work? Is it just not dropping to ground far enough to trigger the relay?

I just went over the manual for that system and I'm assuming your using H2/1light blue second unlock wire for all the doors except the drivers door and your using the blue unlock wire for the drivers door. If this is the case I would put a blocking diode to prevent the positive pulse on the unlock wire. That system has flip flip locks Something like a 1N4007 diode with the band facing the alarm systemIf i Can't Install it    I Don't need it   Joe

Went to two near by Radioshacks and they didn't carry the 4007 diode so I'll have to try our local electronic store tomorrow.

I should've said any of the 1N400x series will workIf i Can't Install it    I Don't need it   Joe

They had a 1n4005, but when reading through the forums I always see people using the 4007. If there isn't a difference I may go grab that 4005 and give that a try tonight.

OK I got the 1n4007 diode and have it wired with the silver band towards the alarm. It still reads 11.8v and drops down to about 6.8v on unlock.