electromechanics! help me!

[Rico]

Some people hook up a battery charger to sensitive electronics...not a good idea. This type of power has a ton of ripple or AC component associated with it and its hell on the sensitive stuff. A battery has absolutely no AC component and it's great for this application.

If the +12 volts is getting clipped somewhere in the harness then powering it remotely with an external source will let you know. The only other way to do it is unplug a bunch of stuff including the PCM and start testing your power/reference wires for resistance to ground. Do you have a pin-out of the PCM?

[Rico]

[BillBoost37]

Did you verify that the 96 Lumina harness would have the pins in the correct places for the 98 GTP OSID?

[Rico]

Did you verify that the 96 Lumina harness would have the pins in the correct places for the 98 GTP OSID?

I went by the information provided: 98 LTZ harness and a 98 PCM. The schematics for the LTZ are the same as the 98 Grand Prix VIN 1.

Good point though.

[BillBoost37]

Wow, thought I had read 96 lumina earlier. See...the coke and water are helping. Couldn't even see straight this morning.

[Rico]

Every time you get into a thread after me I get nervous. That's how good you are. LOL
Once in a blue moon I get ya. So --- gotcha!

[BillBoost37]

It's ok, I'm requesting schematics in two other threads. That'll keep ya busy for a minute. And.. I'm just as human as the next guy.. I just post a lot. Nothing to be worried about. lol