2002 Chevy Express 3500 Van
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=5091
Printed Date: August 19, 2025 at 7:04 AM
Topic: 2002 Chevy Express 3500 Van
Posted By: NVANUT
Subject: 2002 Chevy Express 3500 Van
Date Posted: November 03, 2002 at 4:41 PM
Wiring Diagram? How to bypass Passlock? Or whatever it may have? How to tell if it even has something? I just installed a Viper ESP150 into my Chevy Express 3500 Van, everything was pretty straight forward. However here is my problem. When I try to activate the remote start: Ignition turns on, starter cranks, engine starts for ONE second, system shuts down.
When I try to activate remote start with key IN the ignition, turned to the ON posistion: Remote starter thinks the vehicle is running....Nothing happens When I manually start the van, then use the remote start, I can turn the key to off and remove the key, the van stays running. When I depress the brake pedal the van will shut off. I think it has something to do with the infamous "passlock", however I am not positive. The key does not have any chip or anything, atleast not that I can visually see. PLEASE HELP! I have gotten a huge headache over this, and would appreciate anyones help. Thank You!
Replies:
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 5:44 PM
Have you tried anything with the passlock?
Posted By: NVANUT
Date Posted: November 03, 2002 at 5:58 PM
I don't even know if it has passlock or not? The key does not have any chip on it. This is a base model work van, no power anything, it came with a AM-FM radio only, all basic stuff. It has a 5.7L V8 if that makes any differance. I am currently reading everything here, and trying all sorts of stuff, yet I am still coming up with no results....... :o(
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 6:07 PM
I dont have the digrams in front of me but is there a security light in your instrument panel when you turn the key to ignition position?
Posted By: NVANUT
Date Posted: November 03, 2002 at 6:10 PM
Yes
Posted By: NVANUT
Date Posted: November 03, 2002 at 6:11 PM
I just noticed your email, what do you ride?
Posted By: NVANUT
Date Posted: November 03, 2002 at 6:22 PM
Forgot to mention, If I let the ESP150 go through the 3 starts by itself, then check the diagnostics, it says "low or no rpm". However I am reading 10VAC + at the senser wire, and I have done the tach program over and over again. But when I change it from tach to voltage sensing, it does the exact same thing.
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 6:33 PM
I ride a X1 Lightning. Ok from your ignition switch you should have a small gauge yellow, black, and ORANGE / black.
Posted By: NVANUT
Date Posted: November 03, 2002 at 6:59 PM
Sweet Bike! Ok, so what about those wires? I just tried, for sh*ts and giggles, to remove the security fuse, I tried to manually start the van, and it did the same thing as when the remote start tries to start it, it just started for a split second then shut down. So it definantly has to do with the security system. I don't care about the security, I don't care if it works or not, I just want to bypass it so my remote starter works! Can this be done? or am I forced to wait for some other module to arrive so that I can bypass it? I would prefer if I could just disconnect it all together. Thanks alot for you help so far by the way! :o)
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 7:10 PM
ok did you find those small gauge wires by the ignition switch
Posted By: NVANUT
Date Posted: November 03, 2002 at 7:21 PM
Yes One small SOLID yellow, SOLID black, and a Orange with Black stripe.
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 7:42 PM
START THE VAN, CUT THE YELLOW, STRIP THE BLACK AND MEASURE OHMS BETWEEN KEY SIDE OF THE YELLOW AND THE STRIPPED BLACK, REVERSE METER LEADS AND MEASURE AGAIN. ADD BOTH OHMS DIVIDE BY 2, TAKE THAT RESISTANCE AND GET A RESISTOR FOR THAT TOTAL.
Posted By: NVANUT
Date Posted: November 03, 2002 at 7:44 PM
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 7:46 PM
put that resistor between the other side of the yellow and the stripped black
Posted By: NVANUT
Date Posted: November 03, 2002 at 7:58 PM
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 8:10 PM
try that let me know how it works for ya
Posted By: NVANUT
Date Posted: November 03, 2002 at 8:17 PM
ok, thanks again It may be a few days before I can get the chance to visit a radio shack, but I will let you know.
Posted By: TooDarkTinting
Date Posted: November 03, 2002 at 8:19 PM
Good Luck
Posted By: NVANUT
Date Posted: November 04, 2002 at 6:51 PM
Nope, did not work My daytime running lights do not work anymore though....... *sigh*
Posted By: NVANUT
Date Posted: November 04, 2002 at 6:56 PM
Is it possible that the Black wire is the "bulb test wire" and the Black with white strip wire is the passlock common?
Posted By: securinu
Date Posted: November 04, 2002 at 7:38 PM
the test wire are between the ORANGE / black and yellow. as stated before cut the yellow and test between yellow keyside and ORANGE / black. a good way to do without fluctiation is to put the brake on put the van in reverse and hit the key to start the starter wont crank but you will be able to leave it there long enough to get a reading.also make sure you get a 1% tolerance resistor to match the value.
Posted By: NVANUT
Date Posted: November 04, 2002 at 8:13 PM
Yep, its the ORANGE / Black and Yellow wire. I got the exact tolerance by using 2 resistors in series. Came to exactly 3.309 kohm, which is exactly what was showing on the meter. Now I can sleep in a little longer, knowing my van will be nice and warm, no ice on the windows when I get in it. Ofcourse now my wife wants one on her car! . ............errrr .......cough........ Also found why my running lights were not working.........cough.....seems that they turn off when you have the Ebrake on..........cough........ *feeling stupid*......... Thanks for all your help guys!
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