Question about 1986 Chevrolet Chevy
How do you know 4x4 not working ? when we try to switch to 4x4 the lights are blinking when try to turn to 4 hi and it dosen't kick in ? what could be the problem ? we checked fuses they are good !
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Posted on Jan 02, 2017
SOURCE: 2001 plymouth neon 2.0 mt
I had this problem in my 2000. The most likely cause is a bad wire or broken wire going to the PCM which is located to the front of the vehicle just forward of the Transmission. Bad place I know but that is where they stuck it. There is a Fuse in the Interior panel, a Fuse in the Power distribution box under the hood as well as a relay. If you lose any of those you lose communication with the PCM and the ODB scanner is useless. Check them all, in fact as a precaution just replace them outright. I checked mine 3 times and they were always good when I looked. I finally just replaced them out of frustration and the problem resolved. This will mess with the PCM the longer it goes and I ended up replacing the PCM in my vehicle, a very unhappy $1600 paid for that and the programming. Make sure you take a look at the positive cables from the battery, there is a split off wire that needs to be checked. These cables have a habit of forming corrosion under the insulation and destroying the Copper wire itself. If you feel any brittleness or hear any cracking in the wire when you check it replace it.
Posted on Sep 14, 2011
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