2000 Cavalier Coupe, Viper 791XV

Hello all. I have a 2000 Chevy Cavalier 2 Door Coupe and I am in the process of wiring it all in. I have found all of my wires except my tach signal wire. I've read all of the posts about this topic on this website but none of the wires seem to be working for me.

I am testing for AC voltage on the PURPLE / White wire in the engine harness at different points and it reads out .8 Volts AC. Same result for the white and orange wire.

My car is an automatic but it has a working tachometer. I haven't found that wire under my dash yet, and am unsure whether it work or not.

I've read about the option to use my fuel injector wires instead but they are buried under a steel plate and my intake assembly. I seen one other 2000 Cavalier / Viper setup but he never posted his findings. Thanks for your time.

 On the 2.0 theres a harness that runs over the transaxle. It has 2 white wires in it. One is the tach. The 2.2 theres aplug on the distibutor...it has 6 wires on it. Use the white one

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Thanks for the reply. I have the 2.2L and have tested the white wire with no luck. I am testing for AC voltage and grounding to the chassis. I should be getting a reading of 1-6 Volts and it should fluctuate with the RPM's correct? When I test this wire I only get about .8 Volts. I'll retest it and see if it will work for me this time. Thanks again.

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rekon

Well I have retested that white wire and it does not read in between 1 and 6 Volts AC. When the car is off its at about .05 and when idle its up around .120 and goes up as the RPM's go up so its apparently my tach or some engine speed measurment.

My first question is the input is never a solid number, always changing but usually averaging out. I suppose this is normal due to all the electrical noise. Is it?

My second question is though it seems to be the tach wire, it's not showing above 1 Volt. Will this effect the functionality?

Thanks

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rekon

the white wire is the right one, you need to put one lead of your meter to 12V and the other to the tach wire as these are negative pulses.

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Shaughn Murley
Install Manager, Dealer Services
Visions Electronics
Red Deer, Alberta

Thanks for the information. I still cannot seem to get the 1 to 6 volts I've been reading I need but I have tapped into that wire and ran it to the alarm module. I'll post back here my end result in a few days (I have to wait on door pin switches and passlock bypass.)

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rekon

just curious what the actual "problem" is... since no one has brought it up....    did you try tach learning and it didnt learn?    both the white or PURPLE / white should be fine.....

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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Hasn't become a problem yet. I'm waiting for the UPS guy to give me my passlock bypass so I can finish hooking it all up. I was worried about using the white wire because when I test it with a DMM it reads under 1V AC. The manual says it should be ~1-6V+ AC. The readings show between .300 and .900V AC and changes with the engine speed so I'm pretty confident that this is the wire.

rekon] wrote:

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asn't become a problem yet. I'm waiting for the UPS guy to give me my passlock bypass so I can finish hooking it all up. I was worried about using the white wire because when I test it with a DMM it reads under 1V AC. The manual says it should be ~1-6V+ AC. The readings show between .300 and .900V AC and changes with the engine speed so I'm pretty confident that this is the wire.

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Bingo!!!!!

if it flauxs up and down to  a degree like your saying its it

did you have any problems wireing the door locks

No my car has no power windows or doors. I ran a few extra wires in my doors and a wire to my trunk so when I end up buying the kits I have the wires already ready to go.

I got my Passlock bypass today and I have a few more questions. My car is a 2000 Cavalier 2 door coupe, so that is PassLock I right? In this book that came with the bypass it lists Cavalier's 96 - 99 under Passlock I and nothing at all about Cavaliers anywhere else. I suppose it probably don't matter as the wiring diagram shows its for Passlock I and II.

Heres my simple diagram for my bypass:
Bypass -> Wire on car

White -> Passlock Keyside
Brown -> Vehicle Bulb Test Wire (*Passlock I only*)
Black -> Ground
Orange -> Passlock Computer Side
Gray -> Passlock Ground
Violet -> Negative Trigger Input
Blue -> To Vehicles Ignition
Yellow-> To Vehicles Start Wire (*Passlock I only*)
Green -> Vehicles second ignition wire
Red - 12V Constant

My problem is the wires that say Passlock I only because I am unsure if my car is indeed Passlock I or II. I am also unsure about the negative input wire. Is that a wire from my remote start to the bypass it make it active? And finally the green wire because I don't believe my car has a 2nd ignition, so I may not need that wire at all.

Thanks for taking the time to help me with this, I really appreciate it. This is my first alarm install and I'm close to being done, just have to make these last connections.

Thanks!

Sorry for double posting, can't find an edit button anywhere. In the bypass instructions it says to hook the bulb test wire into a black wire thats in the same connector as the ignition wire in the ignition switch. I don't see this black wire so I am banking on having a passlock II system?

rekon] wrote:

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Sorry for double posting, can't find an edit button anywhere. In the bypass instructions it says to hook the bulb test wire into a black wire thats in the same connector as the ignition wire in the ignition switch. I don't see this black wire so I am banking on having a passlock II system?

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Passlock 2



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Shaughn Murley
Install Manager, Dealer Services
Visions Electronics
Red Deer, Alberta

Well everything is installed and works perfectly. The alarm learned the tach within a few seconds. Thanks for all of the help.

Do they make protective cases for these 2way lcd transmitters?

Sorry for double posting again but after playing with my new toy I noticed that when I enter programming mode on the LCD remote to change features like Beep/Vibrate, Illumination, Page Mode... I found when I push the AUX button and the Trunk, Hood & Trunk, or just the Hood illuminates on the pager. I was curious as to what this changes with the alarm or remote, or does it do anything at all? I can't find any documentation on its function.

Thanks for your knowledge.