This is from AutoMeter's site concerning hooking a tach's signal wire to the Ford EDIS (Electronic Distributorless Ignition System) which you should have in your 99 scort.. if I'm thinking correctly.
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Ford 2.3L, 3.0L, 3.8L, and 4.0L (through mid 90's, 95 & older usually) distributorless ignition
The green wire from the tach will usually connect to pin 12 on the DIS module, and it is usually a black wire with a yellow stripe. This is usually the IDM (ignition diagnostic monitor) or the EDM (engine diagnostic monitor). (2.3L is = 2 PPR; 3.0L, 3.8L, and 4.0L is = 3 PPR)
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Sleeperscort has a How-To on his site that will probably help you some. I think most of the information on that page is still very relevant to your escort.
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Ford 2.3L, 3.0L, 3.8L, and 4.0L (through mid 90's, 95 & older usually) distributorless ignition
The green wire from the tach will usually connect to pin 12 on the DIS module, and it is usually a black wire with a yellow stripe. This is usually the IDM (ignition diagnostic monitor) or the EDM (engine diagnostic monitor). (2.3L is = 2 PPR; 3.0L, 3.8L, and 4.0L is = 3 PPR)
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Sleeperscort has a How-To on his site that will probably help you some. I think most of the information on that page is still very relevant to your escort.
