SR5 v6. Over the past couple of months my 4x4 has engaged at times, and not engaged at times. If it won't engage I shift it into reverse, then forward, a few times, and brake, and most of the time I will eventually hear a clicking noise behind the glove box, after which it comes on. Is there a relay on the passenger side? Might that be the problem, or is there an intermittent signal going to the relay? Other ideas? I try to engage it monthly but that doesn't seem to help. Thanks.
1999 4x4 sporadic engagement
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