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The 98 uses the 8P ECU.The 03 uses the 15M ECU.Fairly different.
I realize it's a later ECU but are the relays different?I haven't seen under the hood of the 03Perhaps someone can take a photo.
I've seen differences from one 1998 to another 1998. I would never attempt to label them for that and other reasons.
Thought if there was a picture somewhere it would save some time tracing everything out. Oh well! ???