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Old 02-25-2004, 09:26 PM   #1 (permalink)
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94 corolla dx aftermarket alarm help

hey, i have an UNGO ms850 (old) alarm, i installed today because i needed somethin (to many kids around here, and to much to lose) but anyway... the car has power door locks, when i arm the system, the doors wont lock, when i disarm the system, they unlock, however, when i hook up my function 1 ( negative lead ) to the lock wire, and press it, the doors lock... they just dont read the charge from the master unit ... according to the diagram for the alarm, theres 2 wires for lock/unlock ... as follows :
White w/blue stripe = (-)unlock/(+)lock
White w/green stripe = (-)lock/(+)unlock

the white with blue stripe is what i have hooked up to the unlock wire, which works, and if i hook it to the lock wire, that works fine too, the white w/green stripe is what wont work anything, im assuming the charge..
the function 1 wire is Yellow w/white stripe.. Aux (-) output
anyone dealt with this? i dont want to pay 100+ dollars to have this old alarm installed when i bought it for 60 including installation in my old car... im guessing the polarity needs to be reversed or somethin.... i need help! post here or email me, ccrashxburn@aol.com
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Old 02-26-2004, 10:21 AM   #2 (permalink)
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This is pretty involved electronics so I am moving this to the tech section, hopefully you'l get good help there...
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Old 02-26-2004, 02:01 PM   #3 (permalink)
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thanks, i really need it.
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Old 02-26-2004, 04:25 PM   #4 (permalink)
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Toyota's use a negative (-) trigger for the door lock / unlock.

So you would use the white w/blue stripe for unlock and white w/green stripe for lock.

Don't use the funtion 1 wire (aux output) for door lock / unlock, thats not what its for.

The aux output (function 1 in your case) is use to drive a relay for a trunk popper motor, etc....

Have you tested the white w/green stripe wire with a DMM to see if theres any output?

Is there a switch on your alarm for the door lock / unlock polarity? If so make sure its set for negative trigger.
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