i screwed up, please help
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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=6989
Printed Date: August 30, 2025 at 2:06 PM
Topic: i screwed up, please help
Posted By: timmi
Subject: i screwed up, please help
Date Posted: December 22, 2002 at 7:50 AM
ok, while installing a rs, i screwed up a 1993 mercury villager i hooked up the wrong wires on the door unlock circuit, sparks flew, and now door locks dont work. pushing the door lock controls (both lock and unlock) does activate the door lock relay, but the actuators do nothing. any ideas? i have not looked into this very closely yet, need to get a wire schematic for the vehicle first. thought maybe you guys would have an idea, thanks
Replies:
Posted By: naughtydog
Date Posted: December 22, 2002 at 3:39 PM
Sounds like you've fried the door motors to me
Posted By: timmi
Date Posted: December 22, 2002 at 4:57 PM
ok heres what i did i found a wire in the drivers kick panel that had no voltage on it at rest, and it would have a positive 12 volts on it while you hold down the "door unlock" button (and the "lock" button had no effect on the wire). so to test this, i locked the doors, then applied 12 volts to this wire to see if it would unlock the doors. it did indeed unlock the doors, but it also shorted out because sparks flew and it got hot. now the doors dont lock or unlock. now, when you hold down the "unlock button" there is no voltage accross this wire, BUT when you hold down the "door lock" button, there is 12 volts across it! weird? did i fry the motors (in all the doors???)? or did i damage a relay? what do you guys think?
Posted By: auex
Date Posted: December 23, 2002 at 8:15 PM
What wire color was it that you applied power to? Did you use a fused source of power when you tested it? Did the doors unlock right away or was it a second after you applied power the the wire? If it was a second after you applied power then you prob blew the relay. I pretty sure you applied power to the unlock motor wire when you did this you blew the path inside one of the relays for the locks. If you aren't familiar with five wire locking systems this means that if one wire gets cut ( or in your case with the relay burnt ) there is no path for the power to go when you use the switch. This would also explain why your wire is testing positive when you use the lock button. You should also check all of your fuses. The locking system should be a negative trigger. The wires are green and white for lock and green and orange for unlock. ------------- Certified Security Specialist
Always check info with a digital multimeter.
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Posted By: timmi
Date Posted: December 23, 2002 at 11:16 PM
thank you soo much! in the back of my mind i was thinking "you should probably put a fuse on there first" but of course i didnt. the wire was for the unlock switch, and yes it was GREEN/ orange. and yes if i can remember correctly, it did take a second for the locks to unlock. all fuses are good. this was my first attempt at autostart with power door locks, and is prooving to be a learning experience. i will next check voltage at the door locks themselves just to verify they are not recieving power and are not blown. again, thank you soo much... i will be back with more info, MERRY CHRISTMAS!!!
Posted By: timmi
Date Posted: January 30, 2003 at 2:11 AM
ok it seems i get very lucky.. i finally found some time and pulled out the relay/power lock control box (black box, 10 pin connector) and i took that apart.. found a burned out diode and a burned up piece of the circuit board... a new diode, some solder and 15 minutes later and i am back in business! door locks work fine now, however, i still havent hooked that part up to the remote starter yet... i will get back to you guys for help on that later, thanks again, also, check out my website.... if you are into stereos or huge amounts of bass, you will enjoy (6 15's and seventeen thousand watts rms) https://www.sounddomain.com/id/timmi
Posted By: Smooth04
Date Posted: January 31, 2003 at 2:51 PM
One tip..... when installing alarms or anything of that sort use a computer/airbag safe tester. That way you probe the wire you are going to test, then hit the switch or activate what you are trying to locate, and the tester tells you positive or negative. I use a Blue-Point CTS24 for all my security installations, that and a multi-meter. One last tip remember when checking wire connections you want tou use a PASSIVE (monitoring voltage) approach, not an ACTIVE (applying volatge) approach. That way you won't have to worry about frying components, or killing yourself by activating an airbag.
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