Question about 1990 Ford F150

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Troubleshooting the 4 wheel drive in my ford 1999

My truck has been running fine,,we bought it off of family who never even used the 4 wheel drive,,and we have only used it about 10 times in the ,"almost" 3 yrs since i bought it,,but today,it would not engage,,and their are no dash lights now,,i have checked everything,, the red line is pullen" vacuum the blue isnt,, i checked all the fuses,,etc. transfer case engages front differential doesnt ..i have checked the actuator,,could u please tell me what it might be,,i am thinken its a celenoid ...i tried to find fuse panel codes (what went to what..etc) but couldnt get nothin for free,,and no free manuals my "hayes" auto manual,, sucks

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Get a chilton manual, some of these are vacuum driven. you didnt mention if your truck has manual or automatic hubs. it may be the control box behind the drivers seat.

Posted on Oct 08, 2008

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