remote starts
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=49718
Printed Date: July 06, 2025 at 5:13 AM
Topic: remote starts
Posted By: JIMMY 2 TIMES
Subject: remote starts
Date Posted: February 09, 2005 at 12:55 PM
I have a question for you guys, how exactly do you test to see if you have the correct tach wire??? I mean i have direct techs diagrams, but i am curious of how to double check them? i have seen a dmm with a bar, that everytime you hit the gas, the bars rise, but is there other way to check if i dont have that function on my dmm? thanks jimmy
Replies:
Posted By: f00dstamps
Date Posted: February 09, 2005 at 1:32 PM
test the wire with a DMM in AC voltage mode with the car off, it should read around 0 volts.
now, start the car and test it in the same mode and you should get something around 6-7 volts.
Posted By: KarTuneMan
Date Posted: February 09, 2005 at 2:17 PM
The DMM is your best friend. SO, get a good one, say one with a tach meter as well!! -------------
Posted By: lapierre162
Date Posted: February 09, 2005 at 8:16 PM
i just installed a crimestopper remote starter in a 2002 trailblazer and cant get any response out of the remotes, tried to program them and they will not program, the system enters program mode but no response from remotes any ideas?
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tim
Posted By: JIMMY 2 TIMES
Date Posted: February 10, 2005 at 11:44 AM
f00dstamps wrote:
test the wire with a DMM in AC voltage mode with the car off, it should read around 0 volts.
now, start the car and test it in the same mode and you should get something around 6-7 volts.
this is gonna sound real stupid, but my dmm has many differnet values for the AC voltage, which one do i set the dmm on
Posted By: kgerry
Date Posted: February 10, 2005 at 11:59 AM
depends on your meter.. mine goes 2 then 20 so i obviously set it on the 20 scale... it only has to be able to read 10 volts AC max... so set your meter on whichever it allows to do that....
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: f00dstamps
Date Posted: February 10, 2005 at 12:01 PM
well, the different values of AC voltage you have should represent the different ranges. i know know which model you have but choose a range that "just" covers the 6-7 volts. there will probably be a 0-10 volt range. if so, use that. you probably don't want to use a 0-50V or 0-100V range because the 6-7V value will appear very small. and you don't want to use a range that's too small (i.e. 0-5V) because it won't show the AC voltage value correctly if it extends beyond that range. the ranges i gave you are purely fictional as they vary with different DMM's but hopefully you get the point now.
i'm lucky because i purchased a DMM that automatically adjusts the range so that i never have to mess with it.
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