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i've been having problems with the 4wd not engaging and after extensive trouble shooting(mostly easter egging) i've come to the conclusion that it is the ADD relay under the dash. i think i can get the 4wd to engage if i switch around the vaccuum lines going to the silenoids. whenever i do this i get the 4wd light on the dash, but it flickers on and off a couple times a second. could this be a sign of a bad relay? exactly where under the dash is the ADD relay located and what does it look like?
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