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Computer wiring color codes

 
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Old 06 May 2003, 09:11 am
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Location: San Juan, Puerto Rico, USA.
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Default Computer wiring color codes

I need your help to tackle my next secret project (more Boost performance, Coming soon).
I need the computer connectors wiring color-coding key, in order for me to tap into some circuits. Your help in this issue will be greatly appreciated with more power adjustments tricks![}]
[?]
Ian-PT-GT
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Old 06 May 2003, 09:28 am
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Ian,

Welcome back, we missed you.

The Wiring diagrams are scattered like the winds in the Service manual. Let us know which circuits, and maybe we can be a little quicker in getting you the info you need. The PCM uses up to 4 connectors. In you case (automatic) it will use all 4; each have 38 contacts, not all are used. If you will email me with a return emaill address, I will see if I can extract the info on the PCM connectors for you and make a .pdf file of them for you that I can attach to email.
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Old 06 May 2003, 09:33 am
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BTW, the quickest tricks to pull are to used resistance, zener diodes to ground or inline diodes to trick the PCM into believing it is getting cooler air, lower temps, etc.; to keep it from degrading performance.

Having said that, ground paths are critical on cars with the level of digital (especially CMOS) circuits as the GT has. If you decide to go the route of "altering" the sensor output, be sure to make all connections both solid and protected from the environment. A compromised ground can cause a "loop" that gets worse with each cycle; eventually resulting in a complete malfunction that may create an ASD (Auto Shut Down) of the circuit under "test".

Good luck, and keep us posted...

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Old 06 May 2003, 01:48 pm
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Quote:
quote:Originally posted by Dalite

Ian,

The PCM uses up to 4 connectors. In you case (automatic) it will use all 4; each have 38 contacts, not all are used.
Ahh...so that's why I have a 'missing' connector...my PT is a 5-speed. I wondered what was supposed to plug in there.
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