strange wire i need to find
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=101122
Printed Date: July 07, 2025 at 10:43 PM
Topic: strange wire i need to find
Posted By: basmoq
Subject: strange wire i need to find
Date Posted: January 13, 2008 at 4:54 PM
Alrighty, here is a strange one. I'm looking at a Huatai (cheep japan alarm) a guy installed and trying to solve his problem. it has a remote start that he can't get to function properly (I'll say again, cheep Japan toy). It starts fine but doesn't continue running half of the time. I think the problem is that he followed a wiring diagram he got online and hooked into a tach signal wire (what you would normally do), but his install manual actually says
"battery charging indicator wire or engine oil pressure indicator wire (the polarity of this wire is negative before engine start and positive after engine started)"
This to me would indicate he has the wrong wire, but I haven't seen a system like this and don't know enough about the aztec 02 he has to figure out where the wire would be.
Any suggestions?
Replies:
Posted By: KPierson
Date Posted: January 13, 2008 at 7:39 PM
You could get a frequency switch and install it on the tach wire and run the output to the remote starter. You could hook the input to the fuel pump. In a pinch you could hook up the (-) when running status output (if equipped) to a relay that goes right back to the remote starter - just to make sure that is what the problem is at least. That is a weird one! ------------- Kevin Pierson
Posted By: basmoq
Date Posted: January 13, 2008 at 7:55 PM
fuel pump is a good idea, that doesn't run when the engine isn't running does it? I'll have to check. I'll play around under the hood at the alternator as well and see if there is a wire on it that does this. I've just never seen anything but tach wires on the rs's I've installed.
Posted By: i am an idiot
Date Posted: January 13, 2008 at 8:07 PM
You could go to the dealership and tell them you need to purchase the Oil Pressure switch, they will have to look at a parts breakdown page. From this you should be able to see where it is mounted. There will probably be only one wire going to the switch, it will get ground through the engine block.
Posted By: basmoq
Date Posted: January 13, 2008 at 8:58 PM
sounds reasonable. thanks for the suggestion! I found a few other things to re-wire while I was looking at his system, 3rd ignition was wired as a accessory wire, polarity on the door pin sensor jumper was wrong (explained the alarm going off constantly), and a few other things. Also, if anyone has to work on an aztec, make sure you wire the trunk sensor to the glass sensor and not the drop down trunk gate...
Posted By: tedmond
Date Posted: January 13, 2008 at 9:29 PM
oh man, any generic unit is a IMO an POS. they are super PITA units. well anyways, the unit has 2 programmable engine detection. 1) Oil Pressure Light
2) Alternator or electrical NOISE (kind dumb IMO)
i have installed a TLD (generic from china for myself since i got it free so wth, might as well) the unit has no tach sense or voltage so i had to use the oil pressure light. thing is, not all cars have this light and some cars, the light doesnt turn off for a min so that causes SUPER grinding. Its not real time so no matter what, you will also get grinding as the unit does now know when to stop starting.
take the OIL PRESSURE LIGHT and wire that with your ignition. you car will start and maybe it will prevent the grind but i doubt it. oil pressure lights are grounded out when they are ON, and switch to 12v when they turn off (tells starter unit to stop cranking) but as i mentioned they do not offer REAL TIME crank/engine monitoring.
Posted By: basmoq
Date Posted: January 14, 2008 at 5:19 AM
lol, that explains a lot. I'll have to see what I can do to find one, maybe slip someone a $20 at the local shop... I'm so glad I went with the viper 5900 in my car, no problems with that unit
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