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Ronnie...Thank you for your help, much appreciated...Dan

I highly recommend that you purchase a '91 Reatta & Riviera Factory Service Manual. They are available on eBay...worth every penny. The most likely issue you have with the ABS warning light staying on is that one (or both) of the front wheel speed sensors is bad. Unfortunately, these front sensors are a one-year-only 1991 design. The end of the lead (the sensor part) is made of black bake o' light type plastic with a small round metal probe protruding from the center (vs. an aluminum canister in previous years). Daves89 or Jim Finn or Marck Barker of eastcoastreattaparts might have or be able to help find them for you. The hydraulic modulator (located in engine compartment drivers side), or its contained relays (2 of them), or the EBCM very rarely go bad (if ever). IMO I'd concentrate on the front wheel speed sensors.