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Old 06-02-2004, 11:56 AM   #1
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Default how to build resistors for passkey work-around

as some of you know, my ignition switch has failed so I need to bypass the pass-key system so I can stop using my remote start to start the car. My question is, the pellet in my key has a resistance of 1132 OHMS, so my question is, how do I get that same resistance so that I can place it between the two sensing wires that go to the ignition switch. Do I need three different resistors? one 1k ohm, one 100 ohm, and one 33 ohm? How do I wire them together? Series? Parallel? The woman at radio shack was NOT willing to help me!
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Old 06-02-2004, 01:51 PM   #2
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If you'd like, I can send you a resistor pack from a remote start box. The Audiovox starters I used to install came with 14 or so different resistors, one for each value GM uses. Most of the time these go unused but I kept many.

I'll have to locate them at home tonight so if you can wait until then, I'll sent them to you. This way you will only have to use one. No parallel, series, solder or otherwise to worry about.

If not, you have the right idea. Combine as few resistors in either series, parallel or both to achieve the correct resistance. The example you gave will be soldered in series (end to end)
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Old 06-02-2004, 06:51 PM   #3
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You wire them in series. Don't believe me? Just use a multimeter to double-check. Parallel is dictated by the formula 1/R1 + 1/R2 + 1/R3 = 1/RTotal
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Old 06-02-2004, 07:31 PM   #4
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Quote:
Originally Posted by randman1
If you'd like, I can send you a resistor pack from a remote start box. The Audiovox starters I used to install came with 14 or so different resistors, one for each value GM uses. Most of the time these go unused but I kept many.

I'll have to locate them at home tonight so if you can wait until then, I'll sent them to you. This way you will only have to use one. No parallel, series, solder or otherwise to worry about.

If not, you have the right idea. Combine as few resistors in either series, parallel or both to achieve the correct resistance. The example you gave will be soldered in series (end to end)
That would be great. how much would I owe you?
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Old 06-02-2004, 07:33 PM   #5
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Series: add the resistances
Parallel: add the inverse (1/R) resistances
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Old 06-02-2004, 07:57 PM   #6
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Quote:
Originally Posted by Custom88
That would be great. how much would I owe you?
No charge, pal. Just PM me with your address and I'll send them tomorrow.
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Old 06-07-2004, 11:37 PM   #7
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i installed the resistor and the car still will not start about 1/10 times. I am out of ideas now that my ignition switch has proven not to be the culprit. :( I am just out of ideas.
anyone, please?! It took me 4 hours to take the dashboard apart enough just to install the resistor and I can't keep taking it apart all the time trying stuff. It'* just so wierd why it starts with teh remote start, but not the key at times. Sometimes the security light will even stay on when the car is running without the key in it. (being sustained by the remote start system.) Is that wierd, or what?
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Old 06-07-2004, 11:52 PM   #8
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You installed the resistor in the wiring to the ignition switch?
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Old 06-08-2004, 12:01 AM   #9
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I cut the two 22-guage wires going to the ignition switch and placed a 1130 OHM resistor between the two wires. (my key has a resistance of 1132 OHMS) Now the car doesn't read the key'* resistance, it only sees the resistor that I placed in series to the wires.
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Old 06-08-2004, 12:54 AM   #10
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Quote:
Originally Posted by Custom88
Sometimes the security light will even stay on when the car is running without the key in it. (being sustained by the remote start system.) Is that wierd, or what?
Yea, that is wired. To me that sounds like an ECM problem, unfortunately. When the ECM sees an incorrest resistance upon crank, it will not allow the engine to start. When it encounters a problem otherwise, the security light will come on and be steady even while driving.
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