Now that we know what car we are working with, my MB factory diagnostic code book says the same thing for the 87 as Gilly's CD. 90% not used, however, the instructions for my Baum tool code reader say 90% means EHA current implausible. The factory code book says that code isn't use****il 1990. Im going to have to either pose this dilema ib the techs only section or phone the mavins at Baum tools. I''l have to get back to you. If the EHA answer works out, remember that the EHA doesn't generate current so swapping it is futile. You need to isolate the reasson the current sent to the EHA is not correct.
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