Compression Ignition Addict
Join Date: Dec 2011
Location: Northern Arizona
Thanked 25 Times in 25 Posts
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Use a test light, find the small terminal that is hot, if neither is hot find the blown fuse in the power distribution box, I don't remember which one it is. Make sure that one of the large terminals is hot. If you are good to this point disconnect the other small terminal that didn't have power and hook the test light to the wire and the other end to a battery positive (since the pcm supplies a ground) turn on key and see if test light turns on. There is a sensor that tells the pcm the engine temp and that may be bad. Only way to fix the pcm is replace it and if that becomes necessary the new pcm needs to be flashed to the code of your old one. I'm not saying pcm's don't go bad but it is rare.
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97 F250 Xlt, built E4od, D60 swap, Baby swamps, tunes by Dp
1.0 housing w/ wwII, 203* t-stat, diy 6637, 4" exhaust
Diy intercooled, 6.0 fan, Diy 140v Idm, Isspro Ev gauges
On board air, E-fuel, 6" lift on 35's