1987 ford ranger emission warning lite does not come on to perform ok check
emw modual does not look like manual picture and color code does not match lite
The EMW module is a timing device that turns the "EMISSIONS" light on at approximately 60,000 miles, indicating required emission system maintenance. 1987 light trucks built prior to January 1988 have a non-resetable EMW module and require part replacement if the "EMISSIONS" light stays on. Now when you say 'does not come on"...an '87 surely has more than 60,000 miles...doesn't it?
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